## 4 Discussion
No previous studies have analyzed EMG activity in OFE with a selector for the intensity of the exercise, and no studies were found that compared the same model of indoor and outdoor machines, with the present  
\begin{table}
\begin{tabular}{c c c c c c c} \hline \hline  & **Eccentric Phase** & **SLP 60\%** & **SLP 75\%** & **BIOFIT-LP 60\%** & **BIOFIT-LP 75\%** & **OFE-SLP** \\ \hline \multirow{4}{*}{SLP} & SLP 60\% & - & \(-24.98\pm 3.49\)\({}^{\dagger}\) & \(-10.20\pm 7.63\) & \(-18.73\pm 7.11\) & \(111.79\pm 8.78\)\({}^{\dagger}\) \\  & SLP 75\% & \(27.48\pm 3.49\)\({}^{\dagger}\) & - & \(17.28\pm 8.74\) & \(8.75\pm 8.02\) & \(139.27\pm 9.61\)\({}^{\dagger}\) \\  & BIOFIT-LP 60\% & \(10.20\pm 7.63\) & \(-17.28\pm 8.74\) & \(-8.53\pm 4.09\) & \(121.99\pm 7.41\)\({}^{\dagger}\) \\  & BIOFIT-LP 75\% & \(18.73\pm 7.11\) & \(-8.75\pm 8.02\) & \(8.53\pm 4.09\) & \(-130.52\pm 7.55\)\({}^{\ddagger}\) \\  & OFE-SLP & \(-111.79\pm 8.78\)\({}^{\dagger}\) & \(-139.27\pm 9.61\)\({}^{\dagger}\) & \(-121.99\pm 7.41\)\({}^{\dagger}\) & \(-130.52\pm 7.55\)\({}^{\ddagger}\) & - \\ \hline \multirow{4}{*}{SLP} & SLP 60\% & - & \(-24.29\pm 6.01\)\({}^{\ast\ast}\) & \(-24.08\pm 11.08\) & \(-31.47\pm 11.64\) & \(85.86\pm 8.64\)\({}^{\dagger}\) \\  & SLP 75\% & \(24.29\pm 6.01\)\({}^{\ast\ast}\) & - & \(0.21\pm 10.15\) & \(-7.18\pm 11.48\) & \(110.15\pm 9.63\)\({}^{\ddagger}\) \\  & BIOFIT-LP 60\% & \(24.08\pm 11.08\) & \(-0.21\pm 10.15\) & - & \(-7.39\pm 6.28\) & \(109.94\pm 9.10\)\({}^{\dagger}\) \\  & BIOFIT-LP 75\% & \(31.47\pm 11.64\) & \(7.18\pm 11.48\) & \(7.39\pm 6.28\) & - & \(117.33\pm 10.15\)\({}^{\ddagger}\) \\  & OFE-SLP & \(-85.86\pm 8.64\)\({}^{\dagger}\) & \(-110.15\pm 9.63\)\({}^{\ddagger}\) & \(-109.94\pm 9.10\)\({}^{\dagger}\) & \(-117.33\pm 10.15\)\({}^{\dagger}\) & - \\ \hline \multirow{4}{*}{SLP} & SLP 60\% & - & \(-10.97\pm 2.70\)\({}^{\ast\ast}\) & \(12.35\pm 4.19\) & \(6.41\pm 4.27\) & \(23.28\pm 4.46\)\({}^{\ddagger}\) \\  & SLP 75\% & \(10.97\pm 2.70\)\({}^{\ast\ast}\) & - & \(23.32\pm 4.43\)\({}^{\dagger}\) & \(17.38\pm 4.58\)\({}^{\ast\ast\ast}\) & \(34.25\pm 4.15\)\({}^{\ddagger}\) \\  & BIOFIT-LP 60\% & \(-12.35\pm 4.19\) & \(-23.32\pm 4.43\)\({}^{\dagger}\) & - & \(-5.94\pm 1.51\)\({}^{\ast\ast\ast}\) & \(10.94\pm 2.41\)\({}^{\ast\ast\ast}\) \\  & BIOFIT-LP 75\% & \(-6.41\pm 4.27\) & \(-17.38\pm 4.58\)\({}^{\ast\ast\ast}\) & \(5.94\pm 1.51\)\({}^{\ast\ast\ast}\) & - & \(16.87\pm 2.92\)\({}^{\dagger}\) \\  & OFE-SLP & \(-23.28\pm 4.46\)\({}^{\dagger}\) & \(-34.25\pm 4.15\)\({}^{\ddagger}\) & \(-10.94\pm 2.41\)\({}^{\ast\ast\ast}\) & \(-16.87\pm 2.92\)\({}^{\ddagger}\) & - \\ \hline \multirow{4}{*}{SLP} & SLP 60\% & - & \(-19.16\pm 3.49\)\({}^{\dagger}\) & \(-102.04\pm 14.40\)\({}^{\dagger}\) & \(-104.26\pm 16.56\)\({}^{\ddagger}\) & \(-15.20\pm 11.15\) \\  & SLP 75\% & \(19.16\pm 3.49\)\({}^{\dagger}\) & - & \(-82.89\pm 15.02\)\({}^{\dagger}\) & \(-85.11\pm 16.76\)\({}^{\ddagger}\) & \(3.95\pm 11.70\) \\  & BIOFIT-LP 60\% & \(102.04\pm 14.40\)\({}^{\dagger}\) & \(82.89\pm 15.02\)\({}^{\dagger}\) & - & \(-2.22\pm 9.75\) & \(86.84\pm 13.62\)\({}^{\ddagger}\) \\  & BIOFIT-LP 75\% & \(104.26\pm 16.56\)\({}^{\dagger}\) & \(85.11\pm 16.76\)\({}^{\ddagger}\) & \(2.22\pm 9.75\) & - & \(89.06\pm 17.86\)\({}^{\ddagger}\) \\  & OFE-SLP & \(15.20\pm 11.15\) & \(-3.95\pm 11.70\) & \(-86.84\pm 13.62\)\({}^{\ddagger}\) & \(-89.06\pm 17.86\)\({}^{\ddagger}\) & - \\ \hline \multirow{4}{*}{SLP} & SLP 60\% & - & \(-12.38\pm 2.44\)\({}^{\ddagger}\) & \(17.11\pm 4.54\)\({}^{\ast\ast}\) & \(10.67\pm 4.70\) & \(10.86\pm 4.30\) \\  & SLP 75\% & \(12.38\pm 2.44\)\({}^{\ddagger}\) & - & \(29.48\pm 5.20\)\({}^{\ddagger}\) & \(23.04\pm 5.32\)\({}^{\ast\ast}\) & \(23.24\pm 4.90\)\({}^{\ast\ast}\) \\ \cline{1-1}  & BIOFIT-LP 60\% & \(-17.11\pm 4.54\)\({}^{\ast\ast}\) & \(-29.48\pm 5.20\)\({}^{\ddagger}\) & - & \(-6.44\pm 1.73\)\({}^{\ast\ast}\) & \(-6.25\pm 3.94\) \\ \cline{1-1}  & BIOFIT-LP 75\% & \(-10.67\pm 4.70\)study being a pioneer in this aspect.