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Table 2.

Ankle joint muscle root mean square electromyography

Unpowered
Powered
MetricBeginningEndBeginningEndCondition P value; THSD
Session 1 Sol. r.m.s. 1.00±0.00 0.88±0.03 0.91±0.12 0.74±0.05 P=0.05 
 TA r.m.s. 1.00±0.00 1.04±0.06 1.52±0.15 1.27±0.11 P=0.001** Powered > Unpowered 
 MG r.m.s. 1.00±0.00 0.96±0.04 1.02±0.06 0.92±0.05 P=0.85 
 LG r.m.s. 1.00±0.00 0.97±0.02 1.06±0.13 0.90±0.06 P=0.93 
Session 2 Sol. r.m.s. 1.00±0.00 0.91±0.04 0.77±0.05 0.69±0.03 P<0.0001** Powered < Unpowered 
 TA r.m.s. 1.00±0.00 0.96±0.06 1.38±0.18 1.07±0.06 P=0.02* Powered > Unpowered 
 MG r.m.s. 1.00±0.00 0.93±0.06 0.93±0.04 0.94±0.06 P=0.45 
 LG r.m.s. 1.00±0.00 0.95±0.03 1.00±0.10 0.82±0.06 P=0.21 
Session 3 Sol. r.m.s. 1.00±0.00 0.93±0.03 0.78±0.04 0.72±0.03 P<0.0001** Powered < Unpowered 
 TA r.m.s. 1.00±0.00 0.97±0.06 1.17±0.08 1.00±0.06 P=0.05 
 MG r.m.s. 1.00±0.00 0.98±0.03 0.98±0.05 0.96±0.06 P=0.52 
 LG r.m.s. 1.00±0.00 1.04±0.03 0.97±0.09 0.90±0.06 P=0.09 
Unpowered
Powered
MetricBeginningEndBeginningEndCondition P value; THSD
Session 1 Sol. r.m.s. 1.00±0.00 0.88±0.03 0.91±0.12 0.74±0.05 P=0.05 
 TA r.m.s. 1.00±0.00 1.04±0.06 1.52±0.15 1.27±0.11 P=0.001** Powered > Unpowered 
 MG r.m.s. 1.00±0.00 0.96±0.04 1.02±0.06 0.92±0.05 P=0.85 
 LG r.m.s. 1.00±0.00 0.97±0.02 1.06±0.13 0.90±0.06 P=0.93 
Session 2 Sol. r.m.s. 1.00±0.00 0.91±0.04 0.77±0.05 0.69±0.03 P<0.0001** Powered < Unpowered 
 TA r.m.s. 1.00±0.00 0.96±0.06 1.38±0.18 1.07±0.06 P=0.02* Powered > Unpowered 
 MG r.m.s. 1.00±0.00 0.93±0.06 0.93±0.04 0.94±0.06 P=0.45 
 LG r.m.s. 1.00±0.00 0.95±0.03 1.00±0.10 0.82±0.06 P=0.21 
Session 3 Sol. r.m.s. 1.00±0.00 0.93±0.03 0.78±0.04 0.72±0.03 P<0.0001** Powered < Unpowered 
 TA r.m.s. 1.00±0.00 0.97±0.06 1.17±0.08 1.00±0.06 P=0.05 
 MG r.m.s. 1.00±0.00 0.98±0.03 0.98±0.05 0.96±0.06 P=0.52 
 LG r.m.s. 1.00±0.00 1.04±0.03 0.97±0.09 0.90±0.06 P=0.09 

Values (means ± s.e.m.) are root mean square (r.m.s.) average from stance phase only normalized to unpowered beginning condition and are therefore unitless; N=9. See Materials and methods for calculations

Statistics: THSD, Tukey honestly significant difference test results;Condition, Powered/Unpowered; P<0.05 indicates statistical significance; *statistical power >0.65; **statistical power >0.80

Sol., soleus; TA, tibialis anterior; MG, medial gastrocnemius; LG, lateral gastrocnemius

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