Selected Spatiotemporal and Joint Angle Parameters in Normal Gait and Nordic Walking with Classical and Mechatronic Poles in Aspects of Sex Differences

Szpala, Agnieszka; Kołodziej, Małgorzata; Struzik, Artur; Jasiński, Ryszard; Bałchanowski, Krzysztof J.; Pietraszewski, Bogdan; Woźniewski, Marek

doi:https://doi.org/10.1155/2022/7905120

BioMed Research International

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Abstract Introduction Materials and Methods Results Discussion Conclusions Data Availability Conflicts of Interest Acknowledgments References Copyright Related Articles

Research Article | Open Access

Volume 2022 | Article ID 7905120 | https://doi.org/10.1155/2022/7905120

Selected Spatiotemporal and Joint Angle Parameters in Normal Gait and Nordic Walking with Classical and Mechatronic Poles in Aspects of Sex Differences

Agnieszka Szpala,¹Małgorzata Kołodziej,¹Artur Struzik,¹Ryszard Jasiński,²Krzysztof J. Bałchanowski,³Bogdan Pietraszewski,¹and Marek Woźniewski⁴

Academic Editor: Georgian Badicu

Received18 Jul 2022

Revised23 Nov 2022

Accepted26 Nov 2022

Published13 Dec 2022

Abstract

Introduction. The aim of this study was to compare selected spatiotemporal parameters and changes in the range of motion in the joints of lower and upper limbs during normal gait and during Nordic walking performed with classical and mechatronic poles of females and males. Methods. The study involved 19 physical education students (11 males and 8 females). The MyoMotion research motion analysis system was used to collect gait kinematic variables. The subject task was to cover a 100 m distance in a straight line with three types of gait: gait without poles, gait with classical poles, and gait with mechatronic poles at preferred velocity. Parameters were measured both on the right (RT) and on the left side (LT) of the body. The data was analyzed using two-way repeated measures ANOVA with the between-subject factor “sex.” Friedman’s test was used when necessary. Results. The most significant differences in spatiotemporal parameters between males and females were revealed in gait with the classical and mechatronic pole (stance phase LT and RT, load response LT and RT, single support LT and RT, preswing LT and RT, swing phase LT and RT, double stance LT and RT, and step length LT), the least in gait without a pole (stance phase RT, load response LT, single support LT, preswing RT, and swing phase RT); whereas, the most significant differences in kinematic parameters were revealed in gait without poles (shoulder rotation RT, wrist radial-ulnar LT, hip flexion-extension LT and RT, knee flexion-extension LT and RT, ankle inversion-eversion LT, and ankle abduction-adduction LT and RT), the least in gait with mechatronic poles (knee flexion-extension LT and RT, ankle dorsiflexion-plantarflexion LT, ankle inversion-eversion LT, and ankle abduction-adduction LT and RT). Conclusion. Statistical analysis revealed many differences in spatiotemporal and kinematic parameters in normal gait, as well as in gait with the classical and mechatronic poles, which allows the conclusion that the gait of females and males should be analyzed separately.

1. Introduction

Gait, as the primary form of locomotion, has been observed by many scientists. Various aspects of gait are studied, e.g., related to the age of the subjects [1, 2], diseases (pathological gait) [3, 4], or the type of training provided [5]. The issue of sex difference in gait analysis is also addressed in many scientific studies. Authors point to differences in gait between males and females identifying anatomical, anthropological, physiological, and even sociological factors [6, 7]. Biomechanical gait analysis is based on the assessment of selected kinetic, kinematic, and spatiotemporal parameters. Although researchers look at the same parameters, the results of their work in this area are proving inconclusive. Factors influencing differences in male and female gait include body build and walking velocity [6, 8]. Females, compared to males, demonstrate a greater range of adduction and internal rotation at the hip joint [9–13], which is explained by the greater ratio of hip width to femur length observed in females [11]. Most of these differences have been tentatively attributed to sexual dimorphism of the human pelvis [14–16]. It has also been observed that females place the lower limb with greater extension at the knee joint [17].

In recent years, there have been many studies on the analysis of Nordic Walking (NW) gait. NW is a form of outdoor physical activity involving walking using poles adapted from cross-country skiing. The main purpose of using poles is to engage muscles not used during normal walking, while maintaining high exercise intensity and a low subjectively perceived level of fatigue [18]. Attention has been drawn to the applicability of this form of activity in both health [19] and in the rehabilitation process in various disease entities (e.g., diabetes, obesity, and cardiac problems) [20].

Comparisons of NW with normal gait have appeared in many studies. Roy et al. [21] described that NW causes an increase in stride length, single support time, double support time, and total support time, while step frequency decreases. However, research findings in this area are inconclusive. In the work of Park et al. [22], comparison of the spatiotemporal gait parameters showed that step frequency, stride length, and step length were increased and stride time and step time were decreased for NW compared with normal walking, respectively. However, in the group of kinematic parameters, the authors indicated a greater range of motion (ROM) in the upper limb joints in NW, especially in the shoulder and elbow joints. Similar observations appeared in the NW for the lower limb, with an increase in maximum hip joint flexion, increase in knee joint ROM in the sagittal and transverse planes, and an increase in maximum pronation at the ankle joint [21].

Some studies also pointed out that NW induces an increase in energy expenditure and consumption of oxygen of about 20% when compared to regular walking at the same frequency. If the velocity of gait is increased, NW reduces the load on the lower limbs and decreases the risk of overloading the sacrolumbar spine at the similar velocity of gait [19, 23].

Correct execution of the NW technique is a fundamental requirement for maximizing the benefits of this practice. This is the reason why systems to monitor this outdoor activity have started to emerge. Using data obtained from synchronized sensors, it is possible to have a complete overview of the users’ gait technique [24]. To improve the rehabilitation monitoring process in selected conditions, mechatronic poles have been developed to provide feedback to the user on basic kinematic and dynamic gait parameters [25]. Although the authors pointed to their main use in rehabilitation, they do not excluded their use in healthy people in supporting the development of correct NW technique while learning it. However, some additional elements (e.g., inertial sensors) placed on the poles slightly change their properties (e.g., total mass or location of the center of mass). In the era of rapid technological progress, more and more items are enriched with additional functions (e.g., a watch showing the heart rate). To our knowledge, so far, none of the articles have compared the influence of the type of NW pole used on the movement technique. It is extremely important to verify that mechatronic poles do not force changes in the correct and desired gait technique with their structure. Taking into account the above remarks, the authors believe that mechatronic poles can be a reliable method of analysis and information on the biomechanics of NW gait in real time, especially in the process of learning this technique. Additionally, in the future, mechatronic poles may be used in the development of an optimal gait model during the rehabilitation of patients with various dysfunctions; therefore, it is necessary to evaluate them earlier in healthy people.

The above reports lead to the formulation of a hypothesis that the use of NW poles and their types changes the gait technique assessed on the basis of spatiotemporal parameters and the ROM in the joints of the limbs. Hence, the aim of this study was to compare selected spatiotemporal parameters and changes in the ROM in the joints of lower and upper limbs during normal gait and during NW performed with classical and mechatronic poles of females and males.

2. Materials and Methods

Nineteen physical education students participated in the study. Characteristics of participants is presented in Table 1.

At the time of data collection, all participants declared to be in good health and free of injuries that could affect the gait technique. All participants were at a similar level of NW gait skills (beginners). The participants were informed about the aims and methodology used in the experiment and gave written informed consent for participation in the investigation. The experiment was approved by the local ethics committee and conducted in accordance with the Declaration of Helsinki.

The MyoMotion research motion analysis system (Noraxon Inc., Scottsdale, Arizona, USA) was used to collect gait kinematic variables. It is a system for the three-dimensional evaluation of motion using inertial measurement unit (IMU) sensors. The system combines wireless data transmission and IMU sensor technology to enable evaluation of any motion in three-dimensional space (e.g., changes in angles between segments and linear acceleration). Each of the sensors included an accelerometer, gyroscope, and a magnetometer for measuring earth’s magnetic field. The IMU sensors were placed on subject’s body according to a model compatible with Noraxon MR3 software, which enabled both data recording and comprehensive analysis. The sensor sampling rate used in this study was 200 Hz. A total of 15 sensors were attached, 3 sensors for each upper and lower limb (right/left) and 3 sensors in the spinal region (on the spinous process of the 7th cervical, 7th thoracic vertebrae, and in the sacral region). Calibration of the IMU sensor for body position was performed before each measurement. The standing position with arms parallel along the torso was used to determine the value of the 0° angle as a calibration posture.

The subject task was to walk a 100 m distance in a straight line using three types of gait: walking without poles, walking with classical NW poles, and walking with mechatronic poles. The walk took place on a pitch with an artificial surface at the so-called natural (preferred) velocity. Two trials were performed for each type of the gait. Mechatronic poles are equipped with sensors to provide feedback on basic kinematic and dynamic gait parameters and allow for the development of an optimal gait model with poles for people with different dysfunctions or in supporting the development of correct NW technique of healthy people [26]. Their detailed technical characteristics have been described in our previous work [23, 25].

The following parameters were recorded separately for the right lower/upper limb (right-RT) and for the left lower/upper limb (left-LT): (a)Spatiotemporal parameters related to the step cycle (%): stance phase duration, load response duration, single support duration, preswing duration, swing phase duration, and double stance duration. Step length (cm), step time (ms), stride time (ms), gait velocity (m/s), and step frequency (step/min) were also recorded(b)ROM at the following joints: elbow (flexion-extension), shoulder (flexion-extension, abduction-adduction, and internal-external rotation), wrist (radial-ulnar, supination-pronation), hip (flexion-extension, abduction-adduction, and internal-external rotation), knee (flexion-extension), and ankle (dorsiflexion-plantarflexion, inversion-eversion, and abduction-adduction)

Wrist flexion-extension has been omitted because for proper NW gait technique, it should appear only in the minimal ROM [27].

The values of all measurements are presented as (). The normality of the distribution of the variables was checked with the Shapiro-Wilk test. Differences between the three types of gait were tested by repeated measures analysis of variance (repeated measures ANOVA) with “sex” as a grouping factor. Homogeneity of variance was verified by Box’s test, sphericity by the Mauchly test, Greenhouse-Geisser correction, and multivariate tests with Wilks’ lambda were applied where necessary. Tukey’s test was used for multiple comparisons. Friedman test and Dunn-Bonferroni post hoc test were used when ANOVA assumptions were violated. To evaluate the effect size of the ANOVA results, partial eta squared () were used, which were interpreted as follows: small effect size for 0, medium effect size for , and large effect size for [28, 29]. An acceptable test power of at least 0.80 was achieved for . Differences in age and basic somatic parameters between males and females were checked with the unpaired tests with Welch’s independent estimation of variance. All analyses were performed using Statistica 13.3.0 (TIBCO Software Inc., Palo Alto, CA). Statistical significance of the results was accepted at .

3. Results

3.1. Spatiotemporal Parameters

Sex differences in spatiotemporal gait parameters measured in “no-pole” (1), “classical pole” (2), and “mechatronic pole” (3) test settings are shown in Table 2. In the classical pole gait setting, compared to no-pole gait, a significant increase/longer step time of both limbs was observed ( and for LT and RT, respectively). In males an increase in swing phase duration RT , step length LT () and RT (), and stride time () and a decrease in stance phase duration RT () and step frequency () were presented. In the test with the mechatronic pole, the only difference noted was for the stride length (), which increased by an average of 11.4 cm in males and 12.4 cm in females compared to no-pole gait. The type of pole used did not differentiate any of the spatiotemporal gait parameters. A greater number of significant differences in spatiotemporal parameters between males and females were observed in the classical and mechatronic pole gaits compared to the no-pole gait.

3.2. Joint Angles

The values of the analyzed kinematic (angular) gait parameters measured in three types of gait: no-pole (1), with the classical pole (2), and with the mechatronic pole (3) are presented in Table 3. Significant differences were found between gait without a pole and gait with both classical and mechatronic poles for the following parameters: shoulder flexion-extension LT ( for gait (1) vs. gait (2) and for (1) vs. (3)), shoulder internal-external rotation LT ( for (1) vs. (2) and (1) vs. (3)), wrist supination-pronation LT ( for (1) vs. (2) and (1) vs. (3)), hip flexion-extension LT ( for (1) vs. (2) and 1 for (1) vs. (3)), and hip flexion-extension RT ( for (1) vs. (2) and for (1) vs. (3)). In the case of females, an additional differences were observed for shoulder abduction-adduction LT ( for (1) vs. (2) and for (1) vs. (3)) and shoulder internal-external rotation RT ( for (1) vs. (2) and (1) vs. (3)). In both sexes, hip internal-external rotation LT () and RT (), and in males wrist radial-ulnar LT () in the mechatronic pole gait differed from the no-pole gait. The difference between the classical and mechatronic pole gaits was only observed for hip internal-external rotation RT ().

The differences between males and females during no-pole gait for most parameters were not retained during the classical and mechatronic pole gaits except: knee flexion-extension LT ( in gait (2) and in gait (3)) and RT ( in gait (2) and in gait (3)) and ankle abduction-adduction RT ( in gait (2) and in gait (3)). It was observed that in the mechatronic pole gait (3), a smaller number of parameters differentiated the males and females compared to the other types of gait, (1) and (2).

4. Discussion

The aim of our study was to compare selected spatiotemporal and angular parameters (range of changes) in the joints during normal gait of females and males with NW gait performed with classical and mechatronic poles. Statistical analysis revealed many differences between males and females in spatiotemporal and kinematic parameters in normal gait, as well as in gait with the classical and mechatronic poles.

4.1. Spatiotemporal Parameters

The most significant differences in spatiotemporal parameters between males and females were revealed in the classical and mechatronic pole gait, and the least in the no-pole gait (Table 2).

Frimenko et al. [30] indicated that males are characterized by a gait with higher preferred velocity and greater stride length but lower step frequency compared to females. In our research, we found no significant differences between the walking velocity of male and female by the type of gait (without and with poles). In the study by Fryzowicz et al. [31], the mean self-selected gait velocity of females aged 21 years was and was similar to the gait velocity () of young females described as “comfortable” in the study by Kerrigan et al. [32]. In the study by Öberg et al. [33], the mean value of gait velocity of females aged 20-29 years, defined as “normal,” was and was similar to the result in our study (). Additionally, Pietraszewski et al. [34] analyzed the gait of only males performed at the “preferred” velocity and obtained a value of , which is also similar to our study of .

Analysis of step length LT and RT, swing phase duration RT, stance phase duration RT, stride time, and step frequency revealed significant differences between normal gait and NW gait with the classical pole, however, only in the male group. In both sex groups, significant differences were found between normal gait and NW gait with the classical pole in step time LT and RT and in stride length between normal gait and NW gait with the mechatronic pole. Kerrigan et al. [32] also found significant difference between female and male stride length in normal gait. In their young healthy female group, average stride length amounted to and was slightly lower compared to the females we studied ().

In the study by Fryzowicz et al. [31], in addition to velocity, other spatiotemporal parameters of normal gait of a group of 28 young, healthy females were analyzed. Parameters such as stride length () and relative swing duration () have taken on higher values than in our study; a step length (), relative stance duration (), and relative double stance duration () have taken lower values (Table 2).

In the work of Li et al. [35], selected spatiotemporal parameters of the gait of women in the third trimester of pregnancy walking at natural speed in various types of shoes were analyzed. Comparing the gait of pregnant women in normal shoes with the normal gait of women without poles in our study, it was observed that parameters such as stride length (), walking velocity (), and single support time () took values lower than in our research, while the step frequency () took higher values.

4.2. Joint Angles

Our study analyzed the change in angles at the following joints: shoulder, elbow, wrist, hip, knee, and ankle. The most differences between males and females were observed in normal gait, followed by classical pole gait, and the least in mechatronic pole gait.

In the study by Öberg et al. [36], knee and hip joint angles were recorded during the midstance and swing phase. Analysis of the course of the joint angle shows that males flexed the knee joint more than females. The opposite is true for the hip joint, where females have a greater ROM than males. In our study, the ROM of knee and hip joints in the sagittal plane was greater in the female group than in the male group.

Pietraszewski et al. [34] investigated the ROM in walking at “preferred” velocity at lower limb joints in a group of young males. ROM in the frontal plane of hip ab-/adduction was 12^o, in the sagittal plane hip flexion 45.5^o, knee flexion 57.8^o, and ankle dorsi-plantarflexion 27.4^o; in the transverse plane, hip rotation was 15.1^o. In our study, the values of all mentioned parameters were higher in the normal gait without the pole.

The characteristics of angular changes in the joints of the lower limb were also presented in Fryzowicz et al. [31], in which only females in normal gait were studied. ROM for hip joint in the sagittal plane was ; in the transverse plane, it amounted to and in the frontal plane to . Knee joint ROM in the sagittal plane amounted to . The ankle ROM in the sagittal plane was 35.1 ± 5.9°. ROM in the hip joint in the sagittal plane was similar to the results in our study () in no-pole walking, and the rotation and ab-/adduction results were smaller. ROM in the knee joint in our study was greater, taking values above 70^o, and in the ankle joint it took smaller values (32-33°).

Bartoszek et al. [27] presented the characteristics of angular changes in the upper and lower limb joints on the right and left side of the body in NW with classical poles. In that paper, the same measurement system as in ours (Noraxon MyoMotion) was used for analysis. However, this work is a single case study (one female), and we observed many differences when comparing these authors’ results to our study. In the study by Bartoszek et al. [27], higher ROM values in the sagittal plane (flexion-extension) at the ankle, hip, and shoulder joints and in the frontal plane (abduction-adduction) at the shoulder and wrist joints were observed. Similar values to ours were seen only in the knee and elbow joint in the sagittal plane (flexion-extension) and in the hip joint in the transverse plane (rotation).

5. Limitations of Research

One of the limitations of this study is the small sample size, which in turn resulted in the failure to achieve the acceptable test power (80%) for some differences. It was mainly influenced by the COVID-19 pandemic, which significantly impeded the recruitment of volunteers for the research. The advantage of males in relation to females may also be a variable that disturbs the obtained results of the research.

An additional limitation may be the lack of assessment of the level of activity and physical fitness of the surveyed students, which could have influenced the obtained results.

6. Conclusions

(1)The most significant differences in spatiotemporal parameters between males and females were revealed in gait with the classical and mechatronic pole (stance phase LT and RT, load response LT and RT, single support LT and RT, preswing LT and RT, swing phase LT and RT, double stance LT and RT, and step length LT), the least in gait without a pole (stance phase RT, load response LT, single support LT, preswing RT, and swing phase RT)(2)Whereas, the most significant differences in kinematic parameters between males and females were revealed in gait without poles (shoulder rotation RT, wrist radial-ulnar LT, hip flexion-extension LT and RT, knee flexion-extension LT and RT, ankle inversion-eversion LT, and ankle abduction-adduction LT and RT), the least in gait with mechatronic poles (knee flexion-extension LT and RT, ankle dorsiflexion-plantarflexion LT, ankle inversion-eversion LT, and ankle abduction-adduction LT and RT)(3)Statistical analysis revealed many differences in spatiotemporal and kinematic parameters in normal gait, as well as in gait with the classical and mechatronic poles, which allows the conclusion that the gait of females and males in the future clinical or scientific research should be analyzed separately(4)The use of mechatronic instead of standard poles did not change the spatiotemporal parameters and the ROM for most joints

Data Availability

The data used to support the findings of this study are available from the corresponding author upon request.

Conflicts of Interest

The authors declare that there are no conflicts of interest regarding the publication of this article.

Acknowledgments

This work was supported by the National Science Centre, Poland (grant number 2016/23/B/NZ7/03310).

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