Endurance training has another ugly side â?????? although fat oxidation increases in trained athletes, with conditioning, more and more of this fat comes from muscle triglyceride (23) â?????? meaning less and less comes from adipose tissue. It seems the body learns to store muscle triglyceride where itâ??????s being used (24), so itâ??????s available for energy more quickly that it would be from adipose tissue â?????? a phenomenon Charles Poliquin so eloquently describes as â?????Kobe beef thighs and butt, all plump and marbled with fat insideâ???.
Conclusion: endurance training is less and less likely to lean you out as you get used to it.