- HIIT improves fitness efficiently and burns similar fat to steady cardio for the time invested.
- Two or three short sessions a week are enough for most lifters.
- Bikes and rowers are easier on joints than sprinting and keep interference with leg training low.
- Canadian guidelines recommend 150 minutes of moderate activity a week; vigorous HIIT counts toward it.
High-intensity interval training alternates hard efforts with easy recovery. It’s popular because it’s short and effective. This guide explains what it does well, sample workouts, and how to fit it alongside strength training.
What HIIT does
- Improves VO2max (aerobic fitness) quickly
- Burns a similar amount of fat over weeks as longer steady cardio, in less time
- Improves insulin sensitivity
Fat loss still depends mostly on diet; HIIT helps through calories burned and better fitness.
Sample workouts
| Workout | Structure | Equipment |
|---|---|---|
| Beginner intervals | 8 x 30 s hard, 90 s easy | Bike, rower |
| Classic 10 x 1 | 10 x 1 min hard, 1 min easy | Bike |
| Norwegian 4 x 4 | 4 x 4 min hard, 3 min easy | Treadmill incline, rower |
| Short sprints | 6 x 15 s all-out, 2 min easy | Air bike |
Warm up for 5 to 10 minutes first, and cool down after.
Combining HIIT with lifting
- Do HIIT after lifting or on separate days, not before heavy leg sessions
- Prefer cycling or rowing over running to reduce joint stress and soreness
- Keep it to two or three sessions a week
- Walking is a great low-stress complement on rest days
Safety
HIIT pushes heart rate very high. People using stimulants such as clenbuterol, or with high blood pressure (including from steroids), should build up gradually and stop for chest pain, dizziness or palpitations. See our blood pressure guide.
Winter options
Air bikes, rowers and indoor cycling classes make winter HIIT easy. If you train outdoors in the cold, warm up longer and cover your mouth to reduce airway irritation.
Frequently asked questions
Is HIIT better than cardio for fat loss?
It burns similar fat over weeks in less time. Diet remains the main driver.
How often should I do HIIT?
Two or three sessions a week is enough for most lifters.
Will HIIT make me lose muscle?
Not if protein and strength training are maintained and HIIT isn’t excessive.
What’s the best HIIT equipment?
Air bikes and rowers are joint-friendly and effective.
This article is general information for adults in Canada, not medical advice. Talk to a doctor or pharmacist before using any prescription drug, anabolic steroid or research compound, and get bloodwork done. If you’re in crisis, call or text 9-8-8 (Suicide Crisis Helpline) any time.
