Other

Rapid increases in running, cycling, or other repetitive aerobic load can exceed tissue tolerance even when intensity is moderate.

Aerobic volume becomes harder to interpret when sleep, energy intake, illness, or recovery capacity are poor.

Exposure tolerance should be treated as an implementation variable; shorter and less intense sessions are more defensible starting contexts than maximal heat stress.

Endogenous synthesis and tissue levels may decline with age.

Immature biosynthetic capacity; higher taurine requirements during development.