A common criticism of this approach is that it typically can not match the rate of fitness gains provided by high - intensity exercise. (philmaffetone.com)
Although they didn't determine whether participants with a positive attitude made greater fitness gains, it wouldn't be surprising if they did. (cathe.com)
Take things up a notch — even for just a few minutes — and you leave that comfort zone, which translates into greater fitness gains. (health.com)