Whats the science behind the different recovery benefits of triathlons compared to single-sport training, and how do the varying physiological demands of each sport impact the bodys ability to adapt and recover? For example, does the cross-training aspect of triathlons lead to improved cardiovascular resilience and reduced muscle damage, or does the repetitive stress of a single sport like cycling ultimately result in greater muscle strength and endurance? Are there any differences in the way the body responds to different types of exercise stress, and how do these differences impact recovery time and overall performance?