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2 Acta of Bioengineering and Biomechanics

2 2020

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The relationship between sagittal spinal curvatures and isokinetic trunk muscle endurance after aquatic exercise training in survivors of breast cancer

Hanuszkiewicz Justyna Maria, Woźniewski Marek, Malicka Iwona

Acta of Bioengineering and Biomechanics

2020

Vol. 22, no. 1

21--30

Assessment of the impact of aquatic exercises on the relationship between sagittal spinal curvatures and isokinetic trunk muscle endurance against standard land exercises in women after breast cancer treatment. Methods: 40 women post breast cancer divided into two groups: a study group (n = 20) participated in the aquatic exercises and a control group (n = 20) performed the land exercises. Data collection occurred both before and after the 8 week intervention. Measurements were taken from the SG and CG performing antagonistic movements (flexions/extensions) to assess the endurance (120 °/s) in isokinetic conditions and a photogrammetric examination to define sagittal spinal curvatures. Results: A significant improvement ( p < 0.05) in total work and average power was found among women after the aquatic exercises irrespective of the muscle group under examination. There were no significant changes in any examined parameters after the land exercises. In the study group, there was a significant association of gamma angle decrease and an increase of all examined functional parameters of total work and average power of both the extensor muscles (r = –0,49 to –0.51) and the trunk flexors (r = –0.48 to –0.51). In the control group, a similar tendency of functional-postural changes was observed only for the extensor muscles of the trunk (r = –0.54 to –0.58). Conclusions: General exercises performed in water, as opposed to those performed on land, are more effective in terms of the functional-postural retations in women after breast cancer.

The influence of Nordic walking on isokinetic trunk muscle endurance and sagittal spinal curvatures in women after breast cancer treatment

Hanuszkiewicz Justyna Maria, Woźniewski Marek, Malicka Iwona

Acta of Bioengineering and Biomechanics

2020

Vol. 22, no. 2

47--54

The aim of this work was to assess the impact of Nordic walking on sagittal spinal curvatures and isokinetic trunk muscle endurance in women after breast cancer treatment. Methods: Thirty-nine breast cancer survivors were divided into two groups: a study group (n = 19) that performed Nordic walking, and a control group (n = 20) that performed a standard general exercise programme. Body posture was assessed using Moiré photogrammetry and trunk muscle (flexors and extensors) endurance at 120°/s was measured isokinetically. Statistical analyses were based on two-way ANOVA with Scheffe post hoc tests and Pearson’s r correlation tests. Results: Women who completed the 8-week Nordic walking intervention showed significant improvements in average power and total work, irrespective of the muscle group investigated. Following training intervention, greater strength-velocity values of the trunk muscles were observed in the study group, compared to the control group. There were no significant changes in postural parameters or correlations for trunk muscle function within spinal curvatures before and after the training interventions. When both groups were combined (Nordic walking + general exercises), functional-postural correlations following the intervention showed a statistically significant tendency toward a reduced inclination of the upper thoracic section, together with increases in all tested functional parameters of the trunk flexor and extensor muscles (r = –0.33 to r = –0.37). Conclusions: Compared to a standard general exercise programme, Nordic walking is more effective for improving isokinetic trunk muscle endurance in women after breast cancer. However, no changes in sagittal spinal curvatures were observed after the 8-week Nordic walking and general exercise interventions.