Generally, impairments in strength and power are evident with how much water loss (in terms of percent of total body mass)?

Impairments in strength and power generally become noticeable with a water loss of about 2% of total body mass. At this level of dehydration, not only can muscular function start to decline, but other physical capacities, such as endurance and overall performance, are also affected. This decline occurs because water plays a critical role in maintaining electrolyte balance, nutrient transport, regulating body temperature, and providing the necessary lubrication for joints and muscles during activity. When hydration levels dip below optimal, these physiological processes become compromised, leading to decreased athletic performance. Thus, recognizing the significance of maintaining hydration for optimal strength and power output is essential in athletic training and sports nutrition.