“Coach, I hit that weight last week — but today I missed it. What’s going on?”
The bar speed was off. The direction of the force was incorrect. The breathing was wrong. The form broke down halfway through the set. They felt recovered, but the results didn’t lie.
A failed lift is frustrating to literally anyone that has begun to make progress in a training facility. It weighs on your mind for the rest of your workout, the entirety of your day, it may even stick with you until you come back next week and do the same workout.
One of the largest reasons you may have not completed your set could be lacking the proper amount and type of rest prior to your set.
Let’s get into the real reason this happens, and why the way you rest between sets might be the weak link in your training.
Most people base rest on feel not function
When attempting to begin a subsequent set most based their readiness to begin solely off their respiration. While this one important factor for recovery, just because your breathing is back to normal does not mean your body is ready to go.
If you’re not considering all the systems that need to recover between sets — you’re training at a deficit. Here’s what often gets missed:
Energy system recovery
- Depending on the volume of reps and sets, the intensity of the lift and the duration, multiple different energy systems, or more likely a combination of them, may have been used. Therefore the recovery of the fuel required to utilise these systems needs to be recovered.
Muscle tissue recovery
- What could be the most common driving factor for rest between sets is skeletal muscle fatigue. Your muscles are still in a state of contraction and need to relax and replenish energy stores.
Nervous system recovery
- Especially evident between heavy or explosive sets, the nervous system needs time to restore its brain to muscle connection.
Respiratory recovery
- Another common form of fatigue that drives the need for rest between sets. If the amount of oxygen is lacking before your following set even begins, the transport of oxygen will limit your muscles ability to perform.
Mental recovery
- Strength training isn’t just physical — it’s cognitive. If you go into a heavy set unfocused, over-hyped, or have not established intent, you’ll likely underperform or mess up your technique.
Recover the Right Systems Based on Your Goal
Let’s fix the problem by looking at what needs to be recovered
1. Phosphagen System (ATP-PC Replenishment)
For short, intense sets, such as heavy squats, cleans, or sprints, you’re burning through your ATP and creatine phosphate stores, fast.
- This system provides energy for about 10 seconds of maximal effort.
- Full replenishment takes 2–5 minutes depending on the intensity.
If you’re training strength or power, this is your number 1 concern between sets. Cut your rest too short, and your next set won’t have the same output, now you’re just doing fatigued reps, not high-quality reps
2. Muscle Oxygenation and Fatigue
This is especially relevant in training intended to increase the mass of muscle known as hypertrophy training or high-rep accessory work.
- After a hard set, the working muscles are low on oxygen and full of metabolites (lactate, Hydrogen ions, etc.,)
- Your rest period gives the muscle time to clear products that may cause muscle pain and re-oxygenate
Rest 30–90 seconds for hypertrophy
Supersets in the same series that train antagonistic muscle groups such as pushing and pulling can help assist in recovery of muscles used in either movement pattern
3. Neurological Reset (CNS Recovery)
Your nervous system is what drives performance, not just your muscles. Heavy lifting taxes your central nervous system (CNS), especially compound lifts at >85% of your 1RM.
- CNS fatigue isn’t just “feeling tired” — it’s reduced motor unit recruitment and firing rate.
- Signs you haven’t recovered: slower bar speed, shakier form, degraded coordination.
For max effort lifts: Rest 3–5 minutes
You can use tools like bar speed (Velocity Based Training) to gauge recovery.
4. Respiration
This one’s obvious, but overlooked. If your breathing is still laboured it is your body attempting to restore oxygen and clear out carbon dioxide. Deeper, slower breathing kicks in as your heart rate lowers, aiding recovery. If you don’t give yourself enough time to catch your breath, your body stays in a stressed state
- Moderate-effort sets: 30–90 seconds
- High-effort strength sets: 90–120 seconds
- Max-effort sprints, conditioning intervals: 2–4 minutes
The harder you breathe post-set, the longer you need to fully reset your oxygen and carbon dioxide balance.
5. Mental Focus and Intent
Not every rest period is just about physiology, sometimes it’s about giving yourself time to re-set your technique and refocus your intent.
Use your rest period to:
- Review what went right/wrong in the last set
- Rehearse the movement mentally (visualization)
- Lock in cues for the next set
Some athletes need to amp up for a max attempt. Others need to calm down to execute. Use your rest period to regulate your arousal level.
Give This a Try
This week, track your rest time the same way you record other metrics of your training session. Recover deliberately and see what it does to your performance.
Takeaway
Don’t treat rest periods as wasted time. They’re an important part of training, if used correctly, they’ll amplify the quality, intensity, and outcomes of your program.
If your results are stalling sometimes your answer isn’t what’s happening during your set, but between them.