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- Strength often peaks in the afternoon and evening hours due to the body’s circadian rhythm.
- Training consistently at the same time of day can boost performance.
- Long-term strength and muscle gains are similar, regardless of the time of day you exercise.
The body's maximum strength and power tend to be higher in the late afternoon and early evening hours compared to the early morning. This means you may perform better during your strength training sessions if you do them later in the day.
Why Does Strength Peak Later in the Day?
Your body follows a 24-hour clock, known as your circadian rhythm. This affects your muscle performance throughout the day, as well as your hormones, body temperature, and nervous system. When it comes to strength training, your circadian rhythm plays an important role in determining when your muscles are strongest and most ready to train.
Your body being stronger later in the day is likely due to three reasons:
- Your neuromuscular system is more awake.
- Your body temperature is higher, contributing to improved flexibility and a reduced risk of injury.
- You have more energy available from the calories you've eaten throughout the day,
However, this doesn’t mean that early morning workouts don’t help build strength. It simply means that peak performance during a single exercise session is often higher in the afternoon or evening.
Can Training Later in the Day Affect Sleep?
Strength training in the evening doesn’t appear to negatively affect the quality of your sleep, as long as it is not performed too close to your bedtime. Working out in the afternoon or evening can actually increase deep sleep, improving energy and cognitive function.
Are There Benefits to Training at the Same Time Every Day?
When you always train at the same time of day, your body adapts to perform better at that time. The more consistent you are, the more your nervous system and muscles learn to adapt to the schedule of your choice.
Researchers examined multiple studies comparing morning versus evening strength training and their effects on strength and muscle size. Here’s what the researchers found:
- Strength tends to be higher in the evenings.
- Consistent morning training can raise morning strength levels to those comparable to evening strength.
- Overall increases in strength and muscle size were similar whether training in the morning or the evening.
This suggests that your routine matters more than the time of day alone. In other words, even though you may feel stronger at certain times of the day, long-term strength gains don’t depend solely on the time of day but more so on the consistency of the workout routine.
Practical Tips for Choosing When To Strength Train
Here’s how to apply this research in real life:
- Train at a time that best fits your schedule: The fact that you strength train at the same time every day (and get a workout in at all) matters more than the time itself. If you want to lift when you're strongest, afternoons and evenings may feel easier and let you lift more weight. However, consistent morning workouts can still produce the same strength and muscle gains over time.
- Don’t train too close to bedtime: Lifting heavy right before bed may affect your ability to fall asleep. Try to finish your workout at least one to two hours before going to bed to improve deep sleep.
- Pay attention to the way your body responds: You may feel better strength training in the morning compared to the afternoon or evening. The most important factor in results is regular, consistent training and progressive overload—not the clock.
When Time Matters Most
Time matters most when:
- You’re training for a specific event or competition.
- You want to match your strength-training time with performance tests or a successful athlete's schedule.
In these cases, training at the same time as your event is scheduled may give you a slight advantage when it comes to neuromuscular readiness, or how ready your brain and muscles are to work together so you can move, lift, and react quickly and strongly.
