9 Reasons You’re Always Tired and Sore After Exercising

Staying consistent is crucial for success in fitness. It’s far better to stick with a moderate routine four days a week than to attempt a perfect program and abandon it after the first day.

This principle is especially important when dealing with soreness. Thanks to a phenomenon known as the repeated bout effect, your body becomes more resistant to soreness the second time you do the same (or a similar) workout. The first time might be painful, but the second round will feel much easier. However, if you wait a week before your second workout, much of that protection fades, leading to a cycle where you take breaks due to soreness, then feel sore again because you took too much time off.

Hitting a personal record is exciting—whether it's your heaviest bench press or your fastest mile. But remember, those PRs are a reward for your hard work, not the work itself.

When you first start training, you might be able to set a new PR each week simply because you’re new to it and progress comes quickly. But once you pass the beginner phase, getting stronger and fitter means training at an intensity that doesn’t leave you completely drained, which is why you should save those PR attempts for special occasions.

Now that you understand consistency is key, it’s also important not to push yourself to the max every single time you hit the gym. So, what should you do? Follow a plan.

A training plan is more than just a schedule telling you to work chest on Monday and back and arms on Tuesday. It’s a comprehensive guide for what exercises to do, when to do them, and how challenging they should be. A good plan ensures that the total workload and the fatigue you feel stay at a manageable level.

Food fuels your body, and active athletes naturally eat a lot. But if you’re trying to lose weight while also working out, or if you're cutting out high-calorie foods because you think they’re not 'healthy', you might be unintentionally hindering your gym progress.

A small calorie deficit can absolutely work alongside intense training, as long as you’re not already too lean or underweight. But reducing your intake to just 1,200 calories and expecting to have enough energy for CrossFit every day is unrealistic.

If running is your primary form of exercise, you're likely aware that strength training is also essential. However, many runners make the mistake of using light weights and doing high repetitions, thinking this will better suit their running needs than lifting heavier weights.

Unfortunately, high-rep training can be exhausting. You end up spending more time on it, and you usually need to perform enough repetitions to fully fatigue your muscles in order to stimulate strength gains. If you find yourself sore or drained after these high-rep sessions, consider switching to barbell exercises or other forms of heavy training.

If you take a short break from lifting or opt for lighter weights temporarily, your body might feel less fatigued and you could potentially lift more or achieve a new personal record. Sounds like a win, right?

However, this temporary improvement—known as a deload—may create the illusion of progress, while actually hindering your long-term gains. If you're facing a stressful week and have been pushing yourself hard in the gym, a deload can be helpful. But if you’re consistently taking deloads every couple of weeks without them being part of your structured program, you’re not moving forward. Focus on consistent hard work, and you’ll improve your capacity to handle that intensity.

Exercise puts a strain on your body, but proper nutrition and sufficient sleep are key to recovery. If you’re not getting enough sleep, you'll feel exhausted constantly—not only from sleep deprivation but also because your body hasn't had the chance to fully repair itself.

If you’re looking for high-tech solutions, WHOOP and Oura both offer tracking features that connect your sleep patterns with your recovery progress. Alternatively, you can keep it simple and just go to bed earlier.

Stress can leave us feeling drained. If you’ve had a tough day at work, your pet isn’t feeling well, or your relationship is going through a rough patch, you might not have the energy for a workout. That’s okay—prioritize your mental well-being in whatever way you need.

However, it’s important to remember that exercise can actually help us manage stress, even when we don’t feel like it. If your stress is being tangled up with guilt about skipping the gym, try to separate the two (and remember, you never need to feel guilty about missing a workout). Take a walk, or do a simple yoga routine, and you might find yourself feeling a bit better.