Key result
Walking 15 minutes is linked to ~44% higher F-wave chronodispersion that remains within normal clinical limits.
Why the study?
Few studies have evaluated normal dynamic F wave values in healthy individuals before and after physical activity.
Does 15 minutes of continuous walking alter dynamic F wave parameters in normal healthy subjects?
Observational (n=34)
No
Does 15 minutes of continuous walking alter dynamic F wave parameters in normal healthy subjects?
Absolute Event Rate: 3.23% vs 2.25%
p-value: p=<0.05
Physical activity induces statistically significant but clinically non-pathological changes in dynamic F wave parameters in healthy individuals.
Activity-induced F-wave shifts stay within normal limits in healthy adults; leaves open effects in neuromuscular disease.
Objectives: F wave is one of the nerve conduction studies, mainly used to study the proximal pathway of peripheral nerves. One of its applications is dynamic assessment, i.e., before and after physical activity, when symptoms develop in some patients. Best to our knowledge, few studies evaluate normal dynamic F wave values in healthy individuals. This study aims to determine and compare normal values of several parameters of Compound Muscle Action Potential (CMAP) and F waves of tibial nerves dynamically before and after physical activity in the lower extremities of 34 normal subjects. These parameters were recorded before and after 15 minutes of continuous walking at intervals of one, five, and ten minutes after the end of physical activity.Results: Normal values of CMAP onset latency and amplitude, minimum, maximum, and mean latency of 10 F waves, F chronodispersion, and F persistence were dynamically collected before and during 10 minutes after physical activity in three phases. Some of the parameters showed significant changes (P<0.05). Although physical activity showed statistically significant effects on some CMAP and F wave parameters (especially F chronodispersion) in normal subjects, none of them exceeded the normal clinical values introduced in the literature.
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Khosrawi et al. (2022) conducted an observational in Healthy subjects (n=34). Physical activity (continuous walking) vs. Baseline (before activity) was evaluated on F-wave chronodispersion (p=<0.05). Although 15 minutes of walking significantly increased F-wave chronodispersion from 2.25 ms to 3.23 ms immediately after activity in healthy subjects, none of the parameters exceeded normal clinical values.
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