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Can I do HIIT everyday?

Author

Rachel Ellis

Published Jan 22, 2026

HIIT is a great, safe, and effective workout, but there's no need to do it every day. Keep it to three times per week. You'll still reap the benefits and give your body time to recover properly. Aaptiv has strength training and HIIT workouts you can do at any time.

What will happen if I do HIIT everyday?

HIIT is the perfect way to condense the benefits of activity into 30 minutes or less. But when it comes to an intense exercise like HIIT, doing it every day, or for periods longer than 30 minutes can put you at risk for injury, overtraining, mental burnout, and prevent muscle recovery.

How many times a week should you do HIIT?

Two to three days a week is a solid amount of HIIT, says Wong, as long as you build in 24 hours of rest and recovery between sessions. So if your goal is to work out four times per week, he recommends two HIIT sessions and two resistance training sessions.

Is it OK to do HIIT 5 days a week?

Gottschall recommends that you only introduce HIIT after at least six months of consistent exercise, doing a mix of cardio and resistance training across five days a week. “At this point you can replace one cardio session with one or two shorter HIIT sessions, separated by two sleep cycles.”

Can I do 20 minutes of HIIT everyday?

If you're tempted to cram your calendar with HIIT sessions then the solution is simple: don't. You should be training four times a week at most, says Camara. Treat yourself and take at least one complete rest day between sessions to let your body recover and avoid injury.

22 related questions found

Can I do HIIT 2 days in a row?

Two to three days a week is a solid amount of HIIT, says Wong, as long as you build in 24 hours of rest and recovery between sessions. So if your goal is to work out four times per week, he recommends two HIIT sessions and two resistance training sessions.

Will I lose weight if I do HIIT everyday?

Are HIIT Workouts Good for Weight Loss? Yes, they are. A great HIIT workout routine will not only burn calories during the workout, but it also keeps your metabolism high enough for you to continue expending energy hours after the routine is done.

Can you overdo HIIT?

Too much HIIT can stress the body and disrupt metabolism, the study found. Researchers in this study wanted to explore how much was too much for excessive exercise. They found that problems started when participants began working out nearly every day, with more long periods of all-out effort in each session.

Can I do HIIT on rest days?

If done regularly, HIIT will help you lose weight and build muscles. Although it's an efficient mode of workout when it comes to achieving quick results, overdoing cardio and HIIT or doing it on rest days can prove to be a double headed sword. It can both harm and benefit you.

Does HIIT burn belly fat?

Can HIIT reduce stomach fat? The answer is yes, according to a 2018 meta-analysis, which looked at 39 studies involving 617 subjects. “HIIT significantly reduced total (p = 0.003), abdominal (p = 0.007), and visceral (p = 0.018) fat mass,” the study's authors said.

Can I do HIIT 6 days a week?

HIIT done wrong could lead to injuries, burn out, and loss of motivation to continue. Realize that your body can only handle so much intense exercise per week. If you attempt to do HIIT and full-body weight lifting sessions 5 or 6 days a week, it's only a matter of time before your system crashes.

How much HIIT should I do daily?

So how often should you do HIIT? There is a lot of research into this type of exercise and its effects on the body. Our partners at Les Mills and the research they've commissioned suggest 30-40 minutes a week with your heart rate above 90 per cent. That translates on average to two 30 to 45-minute HIIT workouts a week.

How long does it take for HIIT to see results?

If you are looking to increase cardiovascular fitness and VO2 max, HIIT can offer results in 6-8 weeks. If you are looking to lose fat using HIIT, the results are 100% dependent on your ability to place yourself in a calorie deficit, which HIIT can help with, but is not the only factor involved in weight loss.

Can too much HIIT make you gain weight?

HIIT may stimulate significantly acute cortisol response and chronically high level of this hormone can increase the risk of a number of health issues including weight gain, depression, digestive issues, chronic fatigue, sleep problems and brain fog.

Can you do HIIT twice a day?

TWICE PER DAY CAN LEAD TO EXTRA CALORIE BURN

are getting so much attention. But intense exercise such as HIIT can be dangerous to do every day, and even more at risk to do twice a day. Aim to have up to one of the daily workouts at or near maximum effort.

Will HIIT make me bulky?

But doing too much HIIT, or the wrong type of HIIT exercises, can cause you to gain unwanted bulky muscle. If you're a mesomorph or endomorph body type, and you're overdoing it on the leg exercises (squat jumps, burpees, jump lunges, etc.), you might see your legs starting to get bulky, rather than slimmer.

Should you have a rest day after HIIT?

Because HIIT forces you to work to max exertion with minimal rest, you need to take some recovery days in between your sessions to allow your muscles to re-charge. Doing HIIT two to three times a week is enough to reap its benefits without going overboard.

Should I workout 5 days a week?

If you really want to see results reflected on the scale and continue to make progress over time, you need to commit to working out at least four to five days per week. But remember, you'll build up to this. To start, you might only want to do two or three days per week and slowly work your way up to five days.

Can I do nothing on rest days?

To be clear: the WORST thing you can do on your rest day is absolutely nothing. You want to aim for light, gentle movements. “Avoid strenuous activities which would put more stress on the body. Rest days can consist of normal activities such as walking, light cardio, etc.

How do you know if you are doing too much HIIT?

How do I know if I'm HIIT-ing too hard?

  1. Excessive fatigue. Feeling tired all the time or excessively fatigued after a workout is a clue that you're training too hard and your body needs a rest.
  2. Sore muscles for longer than 72 hours. ...
  3. Fitness plateaus. ...
  4. Sore joints and frequent injuries. ...
  5. You're HIIT-ing every day.

Is HIIT better than cardio?

HIIT is definitely better at burning calories and helping you shed unwanted pounds. The biggest reason is the anaerobic form of exercise. It burns more calories than cardio both during and after exercising. This phenomenon is called the afterburn effect, or excess post-exercise oxygen consumption (EPOC) effect.

What are the disadvantages of HIIT?

Cons of HIIT

It's a highly demanding form of training and can put strain on the body if you don't have a reasonable training base behind you. If a progressive training program is not followed overuse of HIIT can lead to over training and increased injury risk.

Does HIIT tone your body?

HIIT (High-Intensity Interval Training) is very effective for getting lean because you benefit from both an aerobic and strength-building workout. If your goal is to get lean and build a strong and toned physique, there's no better option than a high-quality HIIT workout.

Does HIIT make your legs bulky?

In most cases, yes, traditional, standard HIIT workouts will make your legs bigger over time, especially if you tend to build muscle more easily.

How much weight can I lose in a month with HIIT?

Adding HIIT to your routine can be an incredibly effective tool to lose 10 pounds in a month. In fact, one study in nine men compared the effects of HIIT to running, biking and resistance training, demonstrating that a 30-minute HIIT session burned 25–30% more calories than the other activities ( 33 ).