Am I Losing Fitness? Why Some Training Days Feel Harder

Have you ever had a week where weights that normally feel fine suddenly feel heavy, your engine seems to have disappeared, or you're struggling with movements you could do easily a few weeks ago?

It's easy to think you're losing fitness. But most of the time, you probably aren't.

Are you actually losing fitness?

Usually not. Your underlying fitness changes relatively slowly, over weeks and months. How well you perform on a particular day can change massively. One hard session is a performance dip, not a fitness loss.

Fitness and performance aren't the same thing

Sleep, work stress, nutrition, hydration, soreness and the amount of training you've done recently can all affect what you're capable of on the day.

Think about it this way: you might be fitter than you were three months ago, but if you've slept badly for two nights, had a stressful day at work and haven't eaten enough, you're probably not going to produce your best performance at 6pm. That doesn't mean the last three months of training have disappeared.

Why training itself can make you feel weaker

This is easy to forget. We train because we want our bodies to adapt and become fitter and stronger. But hard training also temporarily makes us tired.

Sometimes you're actually improving underneath that fatigue – you just can't see it yet. That's why you'll occasionally have a few average sessions followed by a day where suddenly everything feels brilliant.

Progress isn't linear

• You won't add weight to the bar every week forever.
• Your 5K won't get faster every month.
• Some weeks your gymnastics might feel worse rather than better.

How to tell if you're really making progress

Look at your training over months rather than individual sessions. Ask yourself:

• Am I lifting more than six months ago?
• Can I do movements I couldn't previously do?
• Can I handle workouts better?
• Am I recovering faster between rounds?

Those are much better measures of progress than how one Tuesday felt.

What to do on a bad training day

When you do have one of those days where everything feels terrible, scale appropriately, get a good training session in and come back again. Your coach can help you adjust the weights or movements so you still get the benefit.

“One bad session doesn't mean you're going backwards. Consistency over time is what actually moves you forwards.”