9. Workouts feel more challenging
If you have OTS, you may feel like your workouts aremore difficult, like they take more effort to complete. This increase in your perceived effort can make you feel like you’re working harder even though your body is working at its usual rate.
You may have a higher heart rate while you’re working out and a higher resting heart rate during the day. Additionally, your heart rate may take longer to return to its resting rate once you finish exercising.
10. Disturbed sleep
When your stress hormones are out of balance, you may find it hard to relax and let go of tension at bedtime. This cuts into the crucial time your body needs to rest, repair, and restore itself during sleep. Lack of quality sleep can also lead to chronic fatigue and mood changes.