Myth: 45 minutes of heavy weights makes the most testosterone, and cardio reduces testosterone.
Fact: Your muscle fiber composition determines how much lifting and cardio maximize your testosterone. People with mostly slow twitch muscles get the most testosterone from cardio and less heavy weights.
Add some weights to your workout, with the weight and duration depending on your muscle type. That will boost your testosterone levels so you don't lose as much muscle while cycling, which also means you'll be burning more fat instead.
Fact: Your muscle fiber composition determines how much lifting and cardio maximize your testosterone. People with mostly slow twitch muscles get the most testosterone from cardio and less heavy weights.
Add some weights to your workout, with the weight and duration depending on your muscle type. That will boost your testosterone levels so you don't lose as much muscle while cycling, which also means you'll be burning more fat instead.