Effects of Individualized Low-Intensity Exercise and Its Duration on Recovery Ability in Adults

Area of Science:

• Exercise Physiology
• Sports Science
• Human Performance

Background:

• Regular exercise enhances physical health and performance.
• The impact of low-intensity exercise (LIE) duration on recovery ability remains under-researched.
• Understanding optimal LIE protocols is crucial for improving athletic recovery.

Purpose of the Study:

• To investigate the effects of different low-intensity exercise (LIE) durations on recovery ability in healthy adults.
• To compare the impact of 30-minute versus 1-hour LIE sessions on physiological markers and performance.
• To determine the minimum effective duration of LIE for enhancing recovery.

Main Methods:

• Twenty healthy males were randomized into 30-minute (n=10) or 1-hour (n=10) LIE groups.
• Intervention involved 4 weeks of LIE, with controlled heart rate (<2 mmol∙L-1 blood lactate).
• Pre- and post-intervention testing assessed heart rate (HR) and running speed (S) at various blood lactate levels (1.5, 2.0, 4.0 mmol∙L-1).

Main Results:

• The 1-hour LIE group demonstrated significant improvements in running speed (p<0.001) and enhanced endurance.
• The 30-minute LIE group showed no significant improvements in running speed or recovery markers.
• Significant differences in delta HR and delta S were observed between the 30-minute and 1-hour groups (p<0.001).

Conclusions:

• Low-intensity exercise (LIE) for at least 1-hour, twice weekly for 4 weeks, improves recovery ability and running performance.
• 30-minute LIE sessions were insufficient to induce significant physiological adaptations in recovery.
• LIE protocols of 1-hour duration are recommended for enhancing endurance and recovery in adults.