The prone T raise is performed lying face down with both arms extended straight out to the sides at 90 degrees, thumbs pointing toward the ceiling, forming a T shape when viewed from above. You lift both arms off the mat by squeezing the rear deltoids and middle trapezius, hold the top position with a hard shoulder blade pinch, then lower slowly. Evidence on scapular stability exercises consistently shows that prone horizontal abduction — exactly what the T raise trains — is among the most effective movements for the rear delts and middle traps (Reinold et al., 2009).
Most people do their rear delt work bent over, fighting to hold their torso in position while also trying to lift. The prone version removes that entirely. You lie down, the floor handles your torso, and every ounce of effort goes into the rear delts and upper back. Cleaner isolation, less lower back fatigue, same muscles.
The T raise is the 90-degree arm position in the classic YTW series — I (straight overhead), Y (45 degrees), T (straight to the sides), W (bent elbows). Each angle targets a slightly different region of the upper back. Do all four together for a complete scapular warmup, or use the T raise on its own before pressing or rowing work.
Quick Facts
| Starting Position | Prone (lying face down) |
| Arm Position | Straight out to sides, 90° from body, thumbs up |
| Primary Muscles | Rear Deltoids, Middle Trapezius |
| Secondary Muscles | Rhomboids, Lower Trapezius |
| Equipment | Bodyweight (mat optional) |
| Difficulty | Beginner |
| Part of Series | YTW Scapular Stability Series |
Step-by-Step: How to Do a Prone T Raise
- Lie face down. Get on the floor face down (prone) on a mat or firm surface. Extend both arms straight out to your sides, perpendicular to your body at 90 degrees. Rotate your thumbs toward the ceiling. From above, your body and arms form a T.
- Set your position. Brace your core and lightly squeeze your glutes. Rest your forehead on the mat or gaze at the floor — do not look up. Pull your shoulders down away from your ears.
- Lift both arms off the floor. Drive both arms upward off the mat by squeezing your rear deltoids and middle trapezius. Keep your thumbs pointed toward the ceiling throughout — this external rotation keeps the rear delts in their strongest position. Arms stay straight.
- Squeeze the shoulder blades. At the top, pinch your shoulder blades together hard. Hold 1 to 2 seconds. The peak contraction is the whole point — do not rush past it.
- Lower with control. Take 2 to 3 seconds to return arms to the mat. Touch down gently and repeat.
Common Mistakes (And How to Fix Them)
Thumbs Pointing Down (Internal Rotation)
What it looks like: Palms face the floor or thumbs point down when the arms lift.
Why it's a problem: Internal rotation puts the rear deltoid in a poor position and increases the risk of shoulder impingement. You will feel it in the wrong place.
The fix: Before lifting, actively rotate both thumbs toward the ceiling. Keep them there throughout the entire rep.
Shrugging the Shoulders Up
What it looks like: Upper traps fire and the shoulders creep toward the ears as the arms lift.
Why it's a problem: Takes the work away from the middle traps and rear delts and loads the upper traps instead — the opposite of what you want.
The fix: Before every rep, actively pull your shoulders down. Think "shoulders into your back pockets." Keep them depressed throughout the lift.
Bending the Elbows
What it looks like: Arms start to fold as they rise, shortening the lever.
Why it's a problem: Reduces the load on the rear delts by shortening the moment arm. The exercise becomes easier but less effective.
The fix: Imagine your arms are straight metal rods — no bend at any point. If you cannot keep them straight, reduce reps and rest.
Lifting Too High
What it looks like: Arms rise well above shoulder level, with the lower back arching to compensate.
Why it's a problem: Excess range comes from the lower back, not the shoulder. You lose the scapular retraction benefit and risk compressing the lumbar spine.
The fix: Aim for arms parallel to the floor — even slightly below is fine. It's not about height, it's about the squeeze between the shoulder blades.
Get this exercise in a personalized workout
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Easier (Regression)
- Incline T Raise. Lie chest-down on a low incline bench. The incline reduces the gravitational load on your arms, making the first few reps more manageable while still training the same muscles.
- Isometric Hold at Parallel. Lift arms to parallel and simply hold for 15 to 30 seconds. Build endurance in the rear delts and mid-traps before adding reps.
Harder (Progression)
- Weighted Prone T Raise. Hold light dumbbells or water bottles — even 2.5 to 5 pounds is significant at this arm angle. Keep the same form cues: thumbs up, straight arms, hard squeeze at the top.
- Paused Prone T Raise. Hold the top position for 3 full seconds on every rep. The extended isometric challenge is demanding enough that most people do not need to add weight.
- YTW Circuit. Go directly from I raises to Y raises to T raises to W raises — all prone, all back to back. A complete upper back warmup sequence.
Programming Tips
- Sets x Reps: Beginner: 2×12–15 / Intermediate: 3×15–20 / Advanced: 3–4×15–20 with a 2-second hold
- Rest Period: 30–60 seconds
- Frequency: 2–4 times per week, or daily as a warmup
- When in your workout: Before pressing or rowing work. Part of the YTW warmup sequence with I raises, Y raises, and W raises.
Frequently Asked Questions
What muscles does the prone T raise work?
The prone T raise primarily targets the rear deltoids and middle trapezius, with secondary work from the rhomboids and lower traps. With arms extended straight to the sides and thumbs up, gravity loads the rear delts directly — making this one of the most efficient bodyweight rear delt exercises.
Why do T raises lying down instead of bent over?
The prone (lying face down) version removes all lower back strain and lets you focus entirely on scapular retraction. In the bent-over version, you also have to fight to hold your torso position, which fatigues the lower back before the rear delts. Lying down isolates the target muscles cleanly.
Why do thumbs point up in a prone T raise?
Thumbs pointing toward the ceiling creates external rotation at the shoulder, which puts the rear deltoid in a more favorable position for contraction. It also reduces impingement risk compared to a neutral or internally rotated arm position.
How many prone T raises should I do?
Most people do well with 2 to 4 sets of 12 to 20 reps. Since the load is bodyweight only, higher reps and a strong squeeze at the top produce better results than trying to rush through sets. If form breaks down before the target rep count, stop the set.
Can I do T raises every day?
Yes. Prone T raises are low-load and low-risk — suitable as a daily posture and scapular warmup. For strength gains, 2 to 3 sessions per week with proper programming is enough.