Sep 17, 2026 · 1 hr 2 min · 15 segments
What if being fitter, leaner and able to train harder doesn’t necessarily mean you’re healthier? In this episode of Zone2Speak, I’m joined by Renee McGregor, one of the leading voices in sports…
Renee McGregorGuestJulianaHostThere is an obsession with most cyclists with weight.
Cyclists have this complicated relationship with weight.
We have power to weight ratios.
We talk about climbing better if you are lighter.
We have social media showing incredibly lean bodies, and then there are athletes who genuinely believe losing another kilo will make them faster.
Where does the pursuit of being lighter cross the line from potentially helping performance into actively compromising health?

So I think, you know, absolutely, if you are carrying an extra few pounds more than you, your body naturally would do, then possibly like losing that would potentially support your performance.

But when you start pushing and pushing and pushing and pushing, the problem is that as we've talked about, once you get to a point where your body can no longer work for you, so then it's not producing, you know, you're not losing body fat per se, you're losing muscle mass.

if it can't work for you, if you don't have a period and it doesn't have those hormones that it needs to perform well, then it doesn't matter how light you are because you haven't got the system that you need to support the delivery.

Like I said, you might get away with one really great race on that very low weight, but you probably won't get away with it
for

And I think one of the things that's been really interesting is in recent years, there has been more work done on endurance sports in particular around like, what are the factors that can influence performance? And they've stopped.

And it was very, very clear that weight is not a very reflective factor of endurance performance, but body composition might be.

So the more muscle mass you have, the more likely you are to be able to perform.

But I'd say in female athletes, we have to also be careful because as I said, if body fat drops too low, then you're not going to produce estrogen.

I'd also say that the power to weight ratio is really interesting because when you look at things like the tests that they do, the FPT tests and stuff, often they do them for 20 minutes.
There is an obsession with most cyclists with weight.
Cyclists have this complicated relationship with weight.
We have power to weight ratios.
We talk about climbing better if you are lighter.
We have social media showing incredibly lean bodies, and then there are athletes who genuinely believe losing another kilo will make them faster.
Where does the pursuit of being lighter cross the line from potentially helping performance into actively compromising health?

So I think, you know, absolutely, if you are carrying an extra few pounds more than you, your body naturally would do, then possibly like losing that would potentially support your performance.

But when you start pushing and pushing and pushing and pushing, the problem is that as we've talked about, once you get to a point where your body can no longer work for you, so then it's not producing, you know, you're not losing body fat per se, you're losing muscle mass.

if it can't work for you, if you don't have a period and it doesn't have those hormones that it needs to perform well, then it doesn't matter how light you are because you haven't got the system that you need to support the delivery.

Like I said, you might get away with one really great race on that very low weight, but you probably won't get away with it
for

And I think one of the things that's been really interesting is in recent years, there has been more work done on endurance sports in particular around like, what are the factors that can influence performance? And they've stopped.

And it was very, very clear that weight is not a very reflective factor of endurance performance, but body composition might be.

So the more muscle mass you have, the more likely you are to be able to perform.

But I'd say in female athletes, we have to also be careful because as I said, if body fat drops too low, then you're not going to produce estrogen.

I'd also say that the power to weight ratio is really interesting because when you look at things like the tests that they do, the FPT tests and stuff, often they do them for 20 minutes.
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