Table 2. Mean and standard deviation (SD) of the scores of Borg scale questionnaire after 6MWT in the TENS, placebo TENS and no TENS conditions (n=30).

Condition	Mean	SD	Minimum	Maximum
No TENS	11.8	1.62	9	15
TENS	10.8	1.50	7	14
Placebo TENS	11.9	1.47	9	15