Their experiment seems to not be conclusive to my reading. They layered eccentric exercise after four weeks of walking exercise. They compare four weeks of walk

Their experiment seems to not be conclusive to my reading. They layered eccentric exercise after four weeks of walking exercise. They compare four weeks of walking exercise to eight weeks of walking exercise plus four weeks of eccentric exercise and don’t control for the fact eight weeks of walking is twice as much as four. That said there’s a lot of evidence eccentric contraction is crucial for strength gain. But this experiment isn’t convincing alone.