I get a lot of questions about HIIT (high-intensity interval training) and specifically how to do HIIT workout without bulking.
If you’ve been following my blog or Instagram, you know I am a big fan of HIIT for losing weight (my favourite one is interval running).
But, I do advise the girls who want to get lean legs and prefer a slimmer look to not overdo it.
The reason is that most of the HIIT workouts I see online are focused on leg exercises such as burpees, jump lunges, jump squats, box jumps etc.
HIIT is not necessary for getting lean legs (if that is your main goal) as it can often cause your thighs to bulk up (especially the endomorph body type).
This is why I wanted to share with you this full-body HIIT workout for women that won’t cause you to bulk up.
But, it will still help you to burn lots of calories (both during AND after).
In addition, I’ve covered the rest of the questions related to HIIT and its benefits.
If you want to jump straight to the workout, scroll down for the video, below.
BENEFITS OF A FULL BODY HIIT WORKOUT FOR WOMEN

1. HIIT BURNS A LOT OF CALORIES
HIIT workouts usually last from 10 to 30 minutes, but they can give you the same results as a twice as long moderate-intensity workout.
For example, if you run for 40 minutes, and I do a HIIT workout for 20 minutes, you and I will burn the same number of calories.
This means doing a HIIT workout will save you some time and give you great results.
2. HIIT BURNS CALORIES EVEN AFTER THE WORKOUT
With HIIT, you will still continue to burn calories after your workout.
Studies have shown that HIIT increases your metabolism and keeps it that way even hours after you’re done exercising.
Apparently, just two minutes of sprinting can increase your metabolism over 24 hours as much as 30 minutes of running.
THE BEST HIIT WORKOUT FOR WOMEN (THAT WON’T MAKE YOU BULKY)
HIIT exercises do build muscle, which is a good thing, as it helps your metabolism. 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.
If you are not sure about your body type, take my FREE Body Type Quiz.
You will learn your body type in just 2 minutes, and you will get tips on how to eat and train to get the best possible results.
FULL BODY HIIT WORKOUT FOR WOMEN [VIDEO]
HOW TO COMPLETE THE CIRCUIT
- Complete each exercise for 40 seconds, and then rest for 20 seconds.
- Once you have completed 1 round, you can either rest for 1 minute or go straight into round 2.
- Aim to complete 3 rounds in total.
- If it is too difficult, you can just do 2 rounds, and then work your way up to 3 rounds.
HIIT EXERCISES FROM THE VIDEO
1. BENCH HOPS

2. ADVANCED TOE TOUCHES

3. HIGH KNEE RUNS

4. BICYCLE CRUNCHES

5. STRAIGHT PUNCHES

6. MOUNTAIN CLIMBERS

7. ROLL UPS

If you liked this one, you can check out my other workouts here.
FAQ ABOUT HIIT

DOES HIIT BURN FAT?
I used to do a lot of HIIT that included squats, burpees and lunges. And at first, I loved it! It was helping me lose belly fat quicker, and I always felt great after a good HIIT session!
But does HIIT actually burn fat?
To answer simply, no, HIIT typically DOESN’T burn fat. But it does increase your anaerobic threshold.
Let me explain.
When you exercise at a lower intensity, you’re in the so-called aerobic or fat burning zone where you actually burn FAT.
And when you do more strenuous workouts (like HIIT) you get in the anaerobic zone where your body burns carbs.
You’re typically in the anaerobic zone when you do HIIT or weights and in the aerobic (fat burning) zone when you do low-intensity cardio like walking.
So, if your anaerobic threshold is higher, your body will stay in the aerobic (fat-burning) zone for longer.
Basically, it means you’ll burn more fat while doing lower intensity workouts.
WILL HIIT MAKE ME BULKY?
I love doing HIIT, but I know that some HIIT routines CAN build too much muscle in the lower body.
And this is especially true for 2 out of 3 female body types.
Some women, myself included, actually have issues with building too much muscle, so if you feel like traditional HIIT is making you bulky, you are probably right.
When I just started doing HIIT, it gave me amazing results. However, after some time, I noticed something that I really didn’t like.
Because it had lots of squats and burpees, HIIT was making my thighs grow instead of making them smaller.
And I expected that it would help me lose inner thigh fat and make my thighs smaller. Boy, was I wrong!
So, I thought I should do even more HIIT, to get the results I wanted.
But the more I did it, the bigger my thighs. It made me feel so frustrated! I tried talking to other PT’s, but they weren’t very understanding, which made me feel even worse.
Luckily, that all changed when I started learning about different body types. I then realized my body type (mesomorph) builds muscles very easily.
At first, I didn’t like it because it meant I couldn’t do some types of training, like HIIT. But since I knew HIIT had many benefits, I wanted to be able to do it without the fear of getting bigger.
Since then, I’ve designed workout programs and guides for girls that want to get lean and toned but have a tendency to add too much muscle with a standard exercise regime.
HOW OFTEN SHOULD I DO HIIT?
It really depends on what is your workout and diet regime in general and what are your fitness goals overall.
If you’re trying to get lean legs, in particular, I advise doing HIIT only once a week. Read my blog post for more details about how to use HIIT to slim down legs.
If you’re trying to lose weight and improve your fitness levels overall (and you’re not too worried about bulking up your legs), I’d advise doing HIIT two or three times a week.
And for the best results, I recommend doing it first thing in the morning on an empty stomach (also known as fasted cardio).
HOW LONG DOES IT TAKE TO SEE THE RESULTS FROM HIIT?
Assuming your diet is also mostly very healthy, you should normally see results from doing HIIT workouts a few times per week after 4-5 weeks.
I also recommend incorporating resistance training together with HIIT as it will help you lose weight and get toned much faster.
If you’re looking for workouts that will help you get lean & toned, check out this full-body workout you can do at home:
HOW TO GET LEAN LEGS WITHOUT THE FEAR OF BULKING UP
If you are looking for the best way to get slim down your thighs and overall body without getting too muscular, you should definitely check out my Lean Legs Program 1.
My program includes a well-balanced 8-week workout. It is designed to get you in the best shape of your life without fear of adding too much muscle to your body frame.
Each week of the program, you can find one full-body HIIT workout similar to the first one above, so if you’re a big fan of interval training, it will definitely work for you.
We are all different and to get the best possible results we should train and eat according to our body type.
That’s why I designed 3 different versions of my program, one for each of the 3 body types.
I hope you like it!
Love,
Rachael xx





86 Responses
Are there alternatives for some of the moves? Specifically the advanced toe touches and roll-ups? Thank you!
Hi lovely! If you’re having some difficulties in following these exercises, feel free to make some modifications. You can also skip it and repeat the other exercises. I hope this helps! :)
Hi! Will doing this workout video bulk up my calves? I already have really big calf muscles 🥲 Thank you!
Hi lovely! It shouldn’t cause any bulkiness on your legs but if you’re an endomorph and your goal is to slim down your legs, it would be best if you avoid HIIT workouts. :)
Ahh sorry I am a mesomorph. Not an endomorph.
If my version of HIIT is sprinting for 30 secs and walking for 30 sec for a total of 15 mins will that make my legs bigger if say I did it 3 times a week? I am a endomorph.
Hi lovely,
If you’re an endomorph, it would be best if you avoid any type of HIIT workouts or very intense exercises because they can cause unwanted bulkiness. To know the right type of workouts and diet for your body type, feel free to give this detailed blog post a read. I’m sure that you’ll find it very useful. :)
Love,
Len
Hi! How are you doing? I’m confused, I’ve seen Rachel’s HIIT videos for not bulking and there are some in which she does like half burpees (without the push up), jumping lunges, jump squats and even normal squats with a light weight between her legs. Can you do these things without bulking legs?
Hi lovely,
Thanks for reaching out! <3
Rachael modified and designed her workouts so they will still remain low-impact and won't cause any bulkiness. Feel free to try them out. If you need help or tips, you can reach out to us at info@rachaelattard.com :)
Love,
Len