Table 3: Blood serum creatinine (mean ± SD) levels in mg/dL in volunteers in the first week (groups A0 (earthed) and B1 (unearthed)) and in the second week of the experiment (groups A1 (unearthed) and B0 (earthed)).

I (rest)II (15 min of exercise)III (30 min of exercise)IV (40 min of recovery)

A0
A1
B0
B1

Significant differences between phases at .