Assault bike intervals are short bursts of hard pedalling and pushing on an air bike, followed by easy pedalling to recover. To do them safely over 40, warm up for five to eight minutes, set the seat so your knee is slightly bent at the bottom, then alternate 15 to 20 seconds of hard effort with 60 to 90 seconds of easy spinning for four to six rounds. Build up from there. Because the bike’s resistance rises with your effort, you control the intensity entirely, and there’s no impact on your joints.
Why the air bike suits men over 40
The air bike works your arms and legs together, so it raises your heart rate fast without the pounding of sprints on pavement. It’s hard to get hurt on, and it’s as easy or as brutal as you choose to make it. For men who want efficient conditioning in 15 to 20 minutes, it’s hard to beat.
That same quality makes it easy to overdo. The fan never runs out. Going all out on day one leaves you wrecked for days and can be risky if your heart isn’t used to it.
Setting up the bike
- Set the seat height so your knee has a slight bend with the pedal at the bottom.
- Adjust the seat forward or back so your knee stays over the pedal, not far behind it.
- Sit tall with a light grip on the handles, elbows slightly bent.
Technique on each stroke
- Push down through the ball of your foot while pulling the opposite handle back.
- Push the other handle forward as the other foot pushes down.
- Keep your torso stable; don’t rock side to side.
- Breathe rhythmically. Don’t hold your breath during hard efforts.
- During rest, spin easily with low effort, or use legs only.
- Stop the hard effort when your form starts to break.
Mistakes and fixes
Going out too hard. The first 10 seconds feel easy, then your legs fill up. Pace the first rounds.
Too-low seat. The knees bend too much and get irritated. Raise it.
Pulling only with the arms. The legs are your engine. Let your arms add power, not replace it.
Skipping the warm-up. Your heart and muscles need a ramp-up. Five to eight minutes of easy to moderate riding first.
Sample interval sessions
| Level | Work | Rest | Rounds | Notes |
|---|---|---|---|---|
| Starter | 15 s hard | 90 s easy | 4–6 | Hard means about 7 out of 10 effort |
| Intermediate | 20 s hard | 60–90 s easy | 6–8 | Stay consistent across rounds |
| Advanced | 30 s hard | 90 s easy | 6–10 | Only with a solid fitness base |
| Steady option | 15–20 min at a conversational pace | — | 1 | For recovery days or aerobic base |
To see where your hard and easy efforts land in terms of heart rate, the heart rate zone calculator gives a starting estimate.
Easier, harder and joint-friendly options
- Easier: legs only, a gentler effort, or longer rest between rounds.
- Harder: more rounds, shorter rest, or longer work periods. Change only one at a time.
- Sore knees: raise the seat slightly and keep cadence smooth rather than mashing the pedals.
- Sore shoulders: pedal with your legs only and rest your hands lightly on the frame, or let your arms ride along with the handles without pushing.
- No air bike: a rowing machine, a sled push or kettlebell swings can deliver similar intervals.
Workouts with air bike intervals
You’ll find air bike intervals in the joint friendly HIIT workout and the fat loss workout, and as a finisher option in the 3-day workout. For a weekly plan that places hard and easy days sensibly, see the DIY programs.
Questions people also ask
How long should assault bike intervals be?
Short work periods, from 10 to 30 seconds, followed by longer rest periods of 60 to 120 seconds, suit most men starting out. Longer work periods are harder to keep at high quality.
How many intervals should I do?
Start with 4 to 6 rounds after a full warm-up. Build toward 8 to 10 over several weeks if recovery allows.
How often can I do assault bike intervals?
One or two hard sessions a week is plenty for most men over 40, with easier cardio or strength work on other days.
Is the assault bike better than running for intervals?
It's lower impact and easier on knees, ankles and hips, which is a major advantage. Running builds different qualities and needs more gradual loading.