Is your personal trainer lying to you?

Personal trainers know what they're talking about, right? Well, not always.

For most people, having a personal trainer is the dream. That's why celebrities manage to look so good all the time, right? Well actually, maybe not. Apparently there are a few tips the experts love to dish out that might not be that on point. Want to know more? Well, here we go.

SQUATS

Whether you love them or loathe them, these are the key to getting a rounded butt and lean thighs. But there's a right way to do them, which includes not going past a 90 degree angle. Well, that's what they tell you anyway. This is supposed to protect your knees, but according to Chris Fox of CrossFit South Brooklyn it might do the opposite. He tells shape.com that 90 degrees is the moment when there is the most force on the knee joint, which could lead to problems. Instead he recommends going down lower, because that gets the hamstrings involved, which stabilises you and also makes your stronger.

CRUNCHES

Hands up: who's spent hours crunching in the hope of developing a six pack? Well according to Chris, you've been wasting your time. No amount of exercise is going to make your muscles shine through if you're eating badly, because there will be a layer of fat covering them. So the good news is you might actually already have perfect abs under there! But you'll need to reconsider what you shove into your mouth if you want to show them off.

CARDIO

Sorry, we're not saying there's no need to get sweaty at the gym. But if you're looking to drop the pounds, simply pounding the treadmill isn't going to be enough. Chris suggests diet, once again, is vital if you want to see a change in your body. Apart from anything, some types of cardio can cause the hormone that controls your metabolism to reduce, meaning fat is piled on quickly. So it's important to eat a balanced diet too - training isn't going to cut it if you're purging on sugar every night.

PAIN

No pain, no gain... right? Wrong. While it's obviously good to push yourself, you have to know your limits too. Lifting super heavy weights could cause muscle strain and you'll feel light-headed if you do hardcore cardio when you're not used to it. An injury will set your gym routine back weeks too, so we recommend trying hard but listening to your body too.

RUNNING

Many think that pounding the treadmill at the gym is safer than hitting the pavement. It's long been claimed it's easier on the knees, but that's not true. Todd Schlifstein, DO, a clinical instructor at New York University Medical Center's Rusk Institute tells webmd.com that it's the force of your body weight that might cause stress on your joints. Obviously that doesn't change, no matter where you're working out. Get the best out of your exercise by varying it, rather than sticking to running each time.

YOGA

This type of exercise continues to have a moment, and for many it is the perfect low-impact way to workout. But it's not true that all back pain can be cured with it. Certainly it's great for tense muscles and can help strengthen your core, but Todd explains if you have something more serious - such as a disc problem - you might actually do more harm than good. Best to check with your doctor if you have any concerns.

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