According to the ISSA and the ACSM, what is the recommended percentage of VO2 max for maintaining cardiorespiratory fitness?

The recommended percentage of VO2 max for maintaining cardiorespiratory fitness is in the range of 55% to 85%. This range is supported by both the ISSA and the ACSM, as it aligns with the intensity levels generally considered effective for improving and maintaining cardiovascular health. Training within this range allows individuals to sufficiently elevate their heart rate and engage their respiratory system, which is essential for enhancing cardiovascular endurance and overall fitness levels.

Training at a percentage of VO2 max below 55% may not provide enough stimulus to effectively maintain or improve cardiorespiratory fitness, as it typically corresponds to low-intensity activities that do not significantly elevate heart rate or challenge the body's aerobic capacity. Conversely, training above 85% can lead to increased fatigue and may not be sustainable for prolonged periods, which can be counterproductive for individuals looking to maintain fitness rather than pursue maximal performance. Therefore, the recommended range strikes a balance, promoting adequate intensity to foster improvements while remaining accessible for longer durations.