How To Do An Inward 1½ Tuck (403C): Everything I Know About The Dive

The inward one and a half tuck — 403C — is one of those dives that requires you to scare yourself a little bit.

You're flipping toward the board, balance is uncomfortable, and if anything is off on the takeoff it compounds fast. In this breakdown I go through divers from early beginner all the way to professional level — showing exactly what shifts as the dive improves.

There are three things that matter most. Let's go through them.

3 Key Fixes for Your Inward 1½ Tuck

1. Sync Your Arms and Squat — and Straighten Before the Throw

The most consistent mistake at the beginner and intermediate level is starting the arm circle too early — before the knees start to bend.

Your arms and your squat need to begin at the same time. Watch any elite diver and you'll see the knees bend a split second before the arms start to move, then they come together as one unit through the press.

The second piece is the throw itself. It's okay for the arms to have a slight bend at the top of the circle — that's normal — but they need to fully extend and straighten before the throw starts.

If you throw with bent arms, it's like tucking your elbows into your body instead of reaching far out in front of you. You lose all your lever length, and with it, most of your throwing power. Straight arms on the throw is non-negotiable.

Diver Guy's Tip: If you have video of yourself diving and your arms are way ahead of your lower body, fix that timing first — through back jumps and inward dives — before expecting it to transfer to the 1½. The pattern has to be trained before it shows up in the full dive.

2. Stand Tall — Stop the Hip Hinge, Push the Board Down

A lot of divers — especially younger or lighter ones who can't bend the board as much — end up bent at the hips on the takeoff. Coaches might cue you to lean over the board, but what you actually want is a full-body tilt, not a hip hinge.

Your whole body — from ankles to head — should be in one straight line with just a slight lean into the board from the ankle up. When you bend at the hips, you cut off the force from the board before it gets all the way through your body.

And on the squat itself: don't think about jumping up. Think about pushing the board down. The more energy you put into the board, the more it gives back. Get into a deep squat — close to 90 degrees at the knee — and drive it toward the water. The board does the work of sending you up.

Diver Guy's Tip: Head position controls posture more than most people realize. If you're looking down at your feet or the tip of the board, your back will round and your power leaks. Keep your eyes out toward the fulcrum or somewhere further down the board — that cue alone will help you stand taller and stay flatter on the drive up.

3. Throw with Your Arms First, Then Your Hips — The Two-Part Throw

This is the concept that separates intermediate divers from advanced ones on the inward. Think of the throw as having two parts: first your arms lead, hands traveling past your gaze; then your hips snap into the tuck or pike. These are two separate sources of power, not one connected motion.

When a coach tells you that your arms and upper body are "connected" on the throw, they mean your head is going down with your arms instead of staying up while your arms go. The arms should lead from the fingertips. Once they've gone past your eyes, then the hips snap. That sequence is where real rotation comes from — and it's why at the elite level, divers seem to have so much more time in the air even on the same dive.

Diver Guy's Tip: Inward dives are fundamentally a balance challenge — you're flipping toward the board and every instinct tells you to back off. Getting comfortable staying over the board is something you have to build gradually. Fix things on your basic inward dive first before expecting the change to show up on the 1½ and beyond. Lean in a little more each time (if distance is a problem).

Watch the Full Breakdown

In this video I walk through six divers including two professionals doing inward 2½, so you can see what elite body positions look like even on a harder dive. I cover crow hopping, the pike out, and head position in detail — with slow motion on the early divers to show exactly what's going wrong.

Things to watch for:

• Compare the hip angle of the beginner divers vs. Patrick Hausding's straight-line takeoff — the difference in height potential is immediate
• Watch the arm timing on the professional divers arm circles
• Notice how head position affects posture across every level in the video

A Note on Crow Hopping

You'll see crow hopping at higher levels and wonder if it's something to add. For beginners, avoid it. When you crow hop your foot placement as you come back down can shift from where it left, and that's a slip or injury risk. Keep your toes in the same spot and balance becomes a lot easier to maintain while you're building the other fundamentals.

Personally I still don't like it even at the advanced level, unless it's minimal.

Final Takeaways: Inward 1½ Tuck Done Right

• Squat and arm circle start at the same time — knees first, then arms
• Arms must fully straighten before the throw — no bent-arm throws
• Full-body tilt from the ankles, not a hip hinge — stay in one straight line
• Push the board down, not yourself up — deep squat, drive it toward the water
• Eyes out toward the fulcrum — head up keeps the back flat and posture strong
• Throw arms first past your gaze, then snap the hips — two separate phases
• Build balance on the basic inward before loading it onto the 1½

If you're working on your inward 1½ tuck and want personal feedback, I offer virtual coaching for all skill levels. Send in your video and I'll send back drills, voiceover notes, and technique corrections.

👉 Click here to learn more about virtual coaching

Got questions? DM me — I answer every one.

Good luck and I'll see you on the next dive! - DG