How to Get Your Front Splits and Side Splits: A Data-Driven Flexibility Progression

Front splits and side splits are achievable for most adults, not because flexibility is genetic or fixed, but because connective tissue responds predictably to the right training stimulus applied consistently over time. The athletes who fail to get splits usually have the same problem: they trained without measuring, so they couldn’t distinguish progress from stagnation, and they eventually quit.

This guide defines a 12-week progression toward front and side splits with specific, measurable ROM targets at each phase. The emphasis is on quantifying your flexibility in centimeters, so you have objective feedback on whether your training is working.

How to Measure Your Front Splits Progress

The measurement method must be consistent for data to mean anything. Use these standards throughout your training:

Front splits (front-to-back split): Measure the distance from your front heel to the floor directly below your hip. As flexibility improves, your hip drops closer to the floor. When your hip touches the floor with both legs extended, ROM = 0cm. Most adults start at 15-40cm.

Alternative measurement: gap between the inner thigh of the rear leg and the floor, measured at the hip. Both methods work; choose one and use it every time.

Side splits (straddle split): Measure from the floor to your hip (the midpoint between your legs). Most adults start at 30-60cm from the floor. Goal: 0cm.

Measurement protocol:

• Always measure after a 10-minute warmup, never cold
• Same time of day (flexibility is genuinely higher in the afternoon than morning)
• Take measurements every 2 weeks, not more frequently (tissue adaptation is slow)
• Log the measurement in centimeters in your training app immediately after measuring

Target Muscles and Training Frequency

Front splits require flexibility in three primary areas: the hip flexor of the rear leg (psoas, rectus femoris), the hamstring of the front leg, and the hip joint itself (especially hip flexor length for the rear leg).

Side splits require flexibility in the hip abductors and adductors of both legs simultaneously, plus significant hip joint external rotation.

Training frequency: 4-5 sessions per week for meaningful progress. Flexibility training is lower-intensity than strength training; the limiting factor is stimulus frequency, not recovery. More sessions per week produce faster gains, to a point. Six or seven sessions per week doesn’t improve outcomes over five.

Session duration: 15-25 minutes for a focused splits session. Longer sessions don’t produce proportionally better results if intensity (time under stretch) is equated.

Phase 1 (Weeks 1-4): Passive Stretching and Hold Development

Phase 1 establishes the baseline ROM and builds tolerance for extended holds. The goal is not to force depth but to create the habit of consistent, measured practice.

Primary exercises:

Kneeling hip flexor stretch (rear leg): Kneel with one knee on the floor, other foot forward. Push hips forward gently until you feel the hip flexor of the kneeling leg. Hold 60-90 seconds per side, 3 sets.

Supine hamstring stretch (front leg): Lying on back, bring one leg vertical and hold with hands behind the calf or thigh. Hold 60-90 seconds, 3 sets per side. No bouncing.

Seated wide-leg hamstring stretch (side splits): Sit on the floor with legs spread as wide as possible. Hold the forward fold position over each leg and then center. 60-90 seconds per position, 2 sets each.

Standing lunge stretch (hip flexor + hamstring combined): Deep lunge with both hands on the floor beside the front foot. Sink hips forward and down. 60s per side, 3 sets.

Session structure: Spend 15-20 minutes on these four exercises. Log your ROM measurement every 2 weeks.

Expected Phase 1 progress: 3-6cm improvement from starting ROM over 4 weeks, depending on starting flexibility and training frequency. Athletes who are very tight may see more; athletes already near splits may see less.

Phase 2 (Weeks 5-8): Active Stretching and Isometric Contractions

Phase 2 adds active flexibility work and PNF (proprioceptive neuromuscular facilitation) techniques. The addition of isometric contractions consistently produces greater ROM gains than passive stretching alone — a finding replicated across multiple controlled trials (Sharman et al., Sports Medicine, 2006). The mechanism is autogenic inhibition: the Golgi tendon organ responds to the muscular contraction by firing, which sends an inhibitory signal that allows the muscle to relax into a greater range.

Primary exercises:

Hip flexor isometric holds: In the kneeling hip flexor stretch position, press your back knee into the floor as hard as you can for 6 seconds (isometric contraction of the hip flexor). Release and immediately sink deeper into the stretch for 10-15 seconds. Repeat 4-5 cycles. This is PNF contract-relax technique.

Hamstring isometric holds: In the supine hamstring position, press your heel toward the ceiling against your hand resistance for 6 seconds, then release and pull the leg deeper for 10-15 seconds. 4-5 cycles per side.

Active leg raises: Standing, lift one leg forward as high as possible without assistance. Hold 2-3 seconds at peak height. This builds the active hamstring strength needed to control the front split position. 2 sets × 10 reps per side.

Sumo squat holds: Wide stance, toes pointed out, squat as deep as possible. Hold 60s, 3 sets. Builds hip abductor and adductor mobility for side splits.

Dragon pose (yin yoga): Deep lunge with back knee on floor, front foot wide. Sink hips toward the floor over a 3-5 minute hold. This produces significant hip flexor adaptation through long-duration passive stretching.

Session structure: 20-25 minutes. Lead with the isometric contract-relax cycles (higher intensity), then transition to longer passive holds.

Expected Phase 2 progress: An additional 5-8cm ROM improvement from Phase 1 endpoint.

Phase 3 (Weeks 9-12): Loaded Stretching for Final ROM Gains

Phase 3 introduces the techniques from loaded stretching for mobility training to address the final ROM limitations. When passive and active stretching plateaus (which commonly occurs 8-15cm from the final position), loaded stretching provides an additional stimulus that unlocks the remaining range.

Primary exercises:

Jefferson curl: 3 sets × 5 slow reps with 12-20kg (depending on strength level). Targets hamstrings through loaded eccentric elongation. The ROM improvement here directly transfers to front split depth.

Loaded pancake stretch: Weighted forward fold with legs spread. 5-10kg on back, 3 sets × 90 seconds. Directly targets the adductors and inner hamstrings limiting side split ROM.

Loaded lunge stretch: In a deep lunge position, hold a weight plate or kettlebell on the front thigh (adding downward pressure). 5-10kg, 3 sets × 60s per side.

Continue Phase 2 isometrics: Do not drop the contract-relax work from Phase 2. Include 2-3 sets of hip flexor and hamstring isometrics per session.

Session structure: 25-30 minutes. Lead with 2 loaded stretch exercises, then transition to isometric work and passive holds.

Expected Phase 3 progress: 5-10cm improvement from Phase 2 endpoint. Many athletes reach or closely approach splits within Phase 3 if they entered Phase 1 at 20-30cm.

Side Splits vs Front Splits: Different Timeline Expectations

Front splits are generally more achievable faster than side splits for most people. The hip flexor and hamstring flexibility required for front splits responds well to consistent stretching across all three phases.

Side splits require significant hip external rotation and abductor flexibility that develops more slowly. Athletes starting at 40-50cm for side splits may reach 15-20cm by week 12, but full side splits often require an additional 3-6 months of Phase 3 type training.

This is not a reason to deprioritize side split training; it’s information for setting realistic targets. A SMART side split goal for 12 weeks might be “reduce hip-to-floor distance from 45cm to 20cm” rather than “achieve full side splits.” See how to set measurable fitness goals for the framework.

Reading Your Data at Week 12

After 12 weeks, you should have 6 ROM measurements per split type (one every 2 weeks). Plot them or log them in your training app. Three outcomes are possible:

1. Steady linear improvement: Your program is working. Continue with the current structure, progressing load in Phase 3 exercises.
2. Plateau at a specific ROM value: Indicates a tissue or technique issue. Check whether your measurement protocol is consistent. Consider adding more loaded stretching volume.
3. Slow but nonlinear progress: Normal for side splits. Some flexibility gains happen in bursts after extended periods of apparent flatness. Connective tissue adaptation is not perfectly linear.

How to Track Splits in Workout Lab

Configure your splits training exercises in Workout Lab with ROM (centimeters) as the tracked metric. For loaded exercises, add Load. For time-based holds, add Time.

Log your biweekly measurement as an entry for a “Front Split Measurement” or “Side Split Measurement” exercise with ROM set to your current distance from floor. Over 12 weeks, the exercise analysis chart shows your centimeter-by-centimeter progression. This is the clearest possible feedback that training is producing results.

Workout Lab’s goal tracking lets you set a target ROM (for most athletes, 0cm for full splits) and shows your delta improvement week over week. When the number moves from 35cm toward 12cm, you see the gap closing in data, not just in how it feels during practice.

For background on why quantifying flexibility progress matters for long-term outcomes, see Why You Should Track Your Workouts. For a view of how Workout Lab handles ROM tracking alongside strength, holds, and other metrics in a single training log, see Workout Tracking for Any Sport. Athletes who also practice yoga alongside their splits training can apply the same measurement principles to yoga sessions; see how to track yoga and mobility progress for a compatible framework.

Download Workout Lab and log your first ROM measurement today.