Training hard is a net positive in almost every way. But it also accelerates certain processes that require active management.
Sweat volume and skin stress. Active men sweat more, significantly more than the population average. Repeated high-volume sweating creates a more demanding environment for the skin: elevated pH disruption, higher bacterial load on the surface, and greater moisture-related friction. Over time, without the right products, this adds up to irritation, ingrown hairs, and persistent odour issues that don't respond to standard solutions.
Elevated core temperature. Regular intense training increases your average body temperature during activity. This has implications not just for hydration and recovery, but for the skin's microbiome, the ecosystem of bacteria and microorganisms that live on your skin's surface. A compromised or imbalanced skin microbiome is more prone to odour, breakouts, and irritation.
Higher washout of natural skin oils. If you're showering once or twice a day post-training (as you should be), you're also removing more of the skin's natural lipid barrier more frequently. That's an argument for products that work with the skin's chemistry rather than stripping it further.
Clothing and friction. Athletic training gear, tight compression layers, synthetic fabrics, heavy gym kit, creates friction points and traps moisture in ways that ordinary daily clothing doesn't. The underarms, chest, and inner thighs are the areas most commonly affected, and they require targeted solutions.
None of this means you need a complicated, 10-step routine. It means your routine needs to be intentional, built around what your body is actually dealing with, not generic advice that wasn't designed for someone who trains this hard.