Tethered Swim Power Session: 30-Minute Pool Strength Builder

Session Overview

This 30-minute tethered swim session uses a resistance band fixed to the pool wall to build upper-body strength, improve catch mechanics, and increase propulsive force. It’s ideal for intermediate to advanced triathletes looking to add strength work to their swim training without covering large distances.

What You’ll Need

• Swim tether or resistance band (fixed to the pool wall or starting block)
• Belt or harness to attach the tether around your waist
• Swim cap and goggles
• Pull buoy (optional — to isolate upper body)

Warm-Up (5 minutes)

Swim 200m easy freestyle at RPE 3-4, focusing on long strokes and relaxed breathing. Include 2 x 25m catch-up drill to prime your catch mechanics before attaching the tether.

Main Set

Attach your tether and position yourself 2-3 metres from the anchor point. The band should be taut but not over-stretched. Swim with maximum effort to maintain position or inch forward against the resistance. Rest fully between reps.

• 4 x 20 seconds tethered full-stroke swim at maximum effort, 40 seconds rest
• 4 x 15 seconds tethered catch focus (slow tempo, emphasise hold and pull), 30 seconds rest
• 4 x 20 seconds tethered full-stroke with pull buoy (upper body isolation), 40 seconds rest
• 2 x 30 seconds maximum effort — hold your position against the resistance, 60 seconds rest

Cool-Down (5 minutes)

Remove the tether and swim 150m easy backstroke or mixed strokes at RPE 2-3. Finish with 50m very easy freestyle to flush out the effort and let your shoulders recover before getting out of the water.

Coaching Notes

• Keep your hips high and body flat — don’t let the tether drag your feet down
• Focus on a high-elbow catch; sloppy arms will waste the resistance benefit
• If you’re new to tethered swimming, start with 10-second intervals and build up across sessions
• Aim for RPE 8-9 during work intervals — these should feel like near-maximum efforts