Guide · 5 min read · Updated
Warm-Up Sets for Lifting: How to Work Up to a Top Set
A warm-up for a heavy barbell set is a short ramp: a set with the empty bar, then roughly 40, 60 and 80 percent of the target weight for about 5, 3 and 2 reps, with an extra single near 90 percent when the work set is very heavy. The ramp gets you warm and rehearsed without using up the strength you need for the set that counts. The plate calculator tells you what to put on the bar at each step.
What a warm-up is for
Two things, and only two. First, raising muscle temperature and getting blood moving, which is what general warm-up activity does and what a systematic review by Fradkin and colleagues found improves performance in most of the studies they pooled. Second, rehearsing the exact movement under progressively heavier loads so that the first work set is not also the first time your nervous system meets that weight today. Coaching texts such as the NSCA’s Essentials of Strength Training and Conditioning describe this as a general warm-up followed by a specific one.
What a warm-up is not for is doing extra work. Every rep you take at 80 or 90 percent costs something. The art is spending enough to be ready and no more.
The basic ramp
For a work set at 100 kg, a common scheme looks like this:
| Set | % of target | Load | Reps |
|---|---|---|---|
| 1 | empty bar | 20 kg | 8 to 10 |
| 2 | ~40% | 40 kg | 5 |
| 3 | ~60% | 60 kg | 3 |
| 4 | ~80% | 80 kg | 2 |
| Work set | 100% | 100 kg | as prescribed |
The same scheme in lb for a 225 lb work set: empty 45 lb bar, then 95, 135 and 185 lb. Loads are rounded to what is quick to load, not to the exact percentage; 135 lb instead of 135.2 lb, 60 kg instead of 62.5 kg. The point is a steady climb, not precision.
Three details make this work:
- Reps fall as the weight rises. Higher reps with the empty bar and the first plate set the pattern; by 80 percent you are only confirming the weight moves well.
- The gaps are roughly even. Jumping from the empty bar straight to 80 percent skips the rehearsal. Jumping in 10 kg steps all the way wastes energy. Steps of 15 to 20 percent of the target are a reasonable middle.
- The last warm-up is clearly lighter than the work set. A 2-rep set at 80 percent is far from failure and leaves the work set untouched.
Heavier work sets need a longer ramp
As the work set gets closer to your max, the ramp gets more steps and fewer reps per step, so the last warm-up is a crisp single close to the work weight. For a top single or a heavy set of 3 around 90 percent of your 1RM, a scheme might run: empty bar, 40, 55, 70, 80 percent for 5, 3, 2, 1, then a single at about 90 percent of the target, then the work set. That is six warm-up sets, but the heaviest four total only seven reps.
For lighter work, cut steps instead. A set of 8 at 70 percent of your max can follow the empty bar plus two ramping sets, because 70 percent is itself a long way from your limit.
A useful way to size the ramp is to know where the work set sits relative to your max, which is where an estimated 1RM helps. The 1RM calculator gives you that from any recent hard set, and the guide to estimating your max without testing it explains how reliable that number is.
Second and third lifts of the session
The full ramp is for the first heavy barbell movement. Later lifts that use the same joints and muscles, such as a bench press after an overhead press, or a Romanian deadlift after a squat, usually need only one or two ramping sets: something around 60 percent of the work weight for a few reps, then the work set. You are already warm; you only need the rehearsal.
Isolation and machine work after that typically starts with a light first set and goes straight into the work sets.
Rest between warm-up sets
Keep the light sets moving: rest only as long as it takes to change the plates. Once the weight is above about 80 percent of the work set, take a proper rest, 2 to 3 minutes, before the next set. You want to start the work set recovered from the ramp, not racing it. The ACSM’s position stand recommends 2 to 3 minutes of rest for heavy sets of the main lifts, and that applies to the last warm-up as much as the work.
Common mistakes
Too many reps at the top of the ramp. Five reps at 85 percent is a work set, whatever you call it. Keep the last warm-ups to 1 or 2 reps.
Too few steps for a heavy day. Going empty bar, 60, 100 percent for a near-max set means the first time you feel a heavy load is the set that counts. Add a step at 80 and a single near 90.
Treating the warm-up as a test. If a warm-up at 80 percent moves badly, the right answer is usually to take the work set a little lighter or hold the planned weight and accept a harder RPE, not to add a few more warm-ups and hope. Writing an RPE next to the last warm-up in your log makes this decision easier over time; the RPE guide explains the scale.
Skipping the empty bar. It is the cheapest set of the day. Use it for a few extra reps and to check the setup: foot position, grip width, bar height.
Building the ramp from a logged number
If your log says last week’s top set was 100 kg × 5 at RPE 8 and the plan is 102.5 kg × 5 this week, the ramp writes itself: 20, 40, 60, 80, then 102.5. Run the targets through the plate calculator once and note the plates for each step at the top of the page, so the session is a sequence of loads to build rather than sums to do between sets. The guide to plate loading math shows the arithmetic behind it.
A warm-up is a routine, and the best one is the one you repeat the same way every week. Decide the scheme, write it on the log once, and spend your attention on the work sets.
Questions lifters ask
How many warm-up sets should I do before a heavy set?
Three to five, depending on the load. For a work set around 70 percent of your max, an empty-bar set plus two or three ramping sets is enough. For a top single or a set above 85 percent, add one or two more sets with fewer reps so the last warm-up is a single at about 90 percent of the target.
Should warm-up sets be heavy or light?
Both, in order. Start light with higher reps to raise temperature and rehearse the movement, then increase the weight and cut the reps so you arrive at the work set warm but not tired. The last warm-up should feel like a rehearsal, not a work set.
Do I need to warm up for every exercise?
Fully for the first heavy barbell lift of the session. For later lifts that use the same muscles, one or two ramping sets are usually enough. Isolation work after that rarely needs more than a light first set.
How long should I rest between warm-up sets?
Only as long as it takes to change the plates for the lighter sets, about a minute. Take 2 to 3 minutes before the final heavy warm-up and the first work set so you start them fresh.
Sources
- Fradkin AJ, Zazryn TR, Smoliga JM. Effects of warming-up on physical performance: a systematic review with meta-analysis . Journal of Strength and Conditioning Research, 2010;24(1):140-148
- Haff GG, Triplett NT (eds.), National Strength and Conditioning Association. Essentials of Strength Training and Conditioning (4th ed.) . Human Kinetics, 2016
- American College of Sports Medicine. American College of Sports Medicine position stand. Progression models in resistance training for healthy adults . Medicine & Science in Sports & Exercise, 2009;41(3):687-708
This guide is general education about training, not medical advice. If something hurts, stop and get it checked by a qualified professional.