Home > Newsletters > Daily: Love or hate Earth Hour? > Daily Dose: 15 astounding facts about the human body > Health-in-Motion Updated 17 September 2015 Abs right You're doing it wrong: When doing crunches, you're just lifting your shoulders off the ground and flexing your ab muscle (rectus abdominus) without engaging the waist or the lower abdomen (obliques and transverse abdominus). This could create a muscle imbalance which may result in back problems if you don't focus on your inner core muscles. Planking is a more beneficial alternative to crunches as it also works the transverse abdominus muscle (your core). 0 More: Daily Dose: 15 astounding facts about the human bodyHealth-in-Motion advertisement Other news Lifestyle Want to look younger? Facial stretching can help Lifestyle 7 weird health tips that are actually true Diet and nutrition More than 10 reasons why rooibos is good for you Diet and nutrition 3 ways to feel better about yourself in 2018 News 7 celebrities with chronic illnesses Sex Should you pee before or after sex? An expert explains once and for all From our sponsors Managing diabetes in the workplace Back-to-school with diabetes Discover treatments that can help reduce acne What can I do to reduce or remove acne marks? Live healthier Watch out! » Gross fungal infections you can pick up at the gym You go to gym to exercise. But make sure the only thing you pick up is a dumbbell and not one of these gross fungal infections. Holiday health » Your 10-step asthma holiday checklist Don’t let asthma ruin your summer holiday. Whether you are travelling or embracing the summer at home, make sure you plan ahead.