Sweet Spot Outdoor Ride: 4×10-Minute Intervals

Session Overview

Sweet spot training sits just below threshold — hard enough to build significant aerobic capacity, but sustainable enough to recover from quickly. This outdoor ride uses 4×10-minute blocks at 88–93% FTP (RPE 7–7.5) to build race-specific cycling endurance. It’s one of the most efficient sessions in triathlon training, delivering a high fitness return with manageable fatigue cost.

What You’ll Need

• Road bike or triathlon bike in good working order
• Cycling computer or GPS watch with lap/interval function
• Power meter (optional but ideal for precise zone targeting)
• Energy drink or gels for fuelling the longer efforts
• Helmet, cycling shoes, and appropriate clothing for the weather

Warm-Up (20 minutes)

Ride 20 minutes easy at Zone 2 (conversational effort, 55–65% FTP). Include 3×30-second acceleration efforts in the final 5 minutes — ride hard for 30 seconds, then easy for 60 seconds between each. These activate your neuromuscular system before the main set.

Main Set

Complete 4×10 minutes at sweet spot effort (RPE 7–7.5, or 88–93% FTP if you have a power meter). Take 5 minutes of easy Zone 2 riding between each interval. Aim for a flat or gently rolling road for each 10-minute block.

• Interval 1: 10 min sweet spot — focus on smooth pedalling, cadence 85–95 rpm
• Recovery: 5 min easy Zone 2
• Interval 2: 10 min sweet spot — settle in, maintain cadence, breathe deeply
• Recovery: 5 min easy Zone 2
• Interval 3: 10 min sweet spot — this one will feel harder; hold your power/effort
• Recovery: 5 min easy Zone 2
• Interval 4: 10 min sweet spot — final push, give everything without blowing up

Cool-Down (15 minutes)

Ride 15 minutes very easy at Zone 1 (below 55% FTP or easy spin). Focus on a high cadence (95+ rpm) with minimal resistance to flush the legs. Drink at least 500ml during or after the cool-down.

Coaching Notes

• Sweet spot should feel hard but sustainable — not a time trial. If you’re gasping after 3 minutes, you’ve gone too hard.
• Without a power meter, use heart rate: sweet spot typically corresponds to 85–92% of max HR after the first 2–3 minutes of the interval.
• Make it easier: reduce to 3×10 min or extend recovery to 7 minutes.
• Make it harder: increase interval duration to 15 minutes or cut recovery to 3 minutes.