--- ---  # This Week in Health: Have More Sex, Eat Soy, Do Zumba by [Alexandra Sifferlin](https://time.com/author/alexandra-sifferlin/) ## Alexandra Sifferlin Mar 10, 2017 8:49 PM UTC  Getty Images by [Alexandra Sifferlin](https://time.com/author/alexandra-sifferlin/) ## Alexandra Sifferlin Mar 10, 2017 8:49 PM UTC We thought we knew a lot about sex and exercise, but this week proved there’s still a lot to learn. Here’s what else grabbed our attention in health this week. ## [Here’s how much sex you should have each week](https://time.com/4692326/how-much-sex-is-healthy-in-a-relationship/?xid=newsletter-health) Experts think they’ve pinpointed the [perfect weekly sex quota](https://time.com/4692326/how-much-sex-is-healthy-in-a-relationship/?xid=newsletter-health)—just in time, too. A new study found that the average American has sex nine fewer times per year now than in the past, despite the fact that sex has been linked to a [stronger heart and better mental health](http://time.com/4656925/sleep-patterns-sex-life/). ## [Why Zumba is insanely good exercise](http://time.com/4696746/zumba-workout-dance-aerobics/) Zumba is a dance and music-filled workout that’s both incredibly fun and a great way to get fit. If you want to mix up your [exercise routine](http://time.com/4474874/exercise-fitness-workouts/), here’s why Zumba should be on your list. ## [The cancer-soy connection is getting less confusing](https://time.com/4690944/soy-may-lower-death-from-breast-cancer/?xid=newsletter-health/) New research is clarifying whether there is any link between breast cancer and eating soy. There’s been a lot of back and forth, but soy appears to not be so bad for women after all. ## [Is it bad to stay inside all day?](https://time.com/4692022/staying-inside-mental-health/?xid=newsletter-health) When the weather is crummy, it’s easy to stay inside and be a couch potato. But you may want to consider getting some fresh air instead. ## [Most kids can’t spot fake news](https://time.com/4694165/more-than-half-of-kids-say-they-cant-spot-fake-news/?xid=newsletter-health) Thanks to digital devices, children have more access to the news than ever before. However, they don’t necessarily know what’s real online and what’s not. ## [Access to most effective birth control could save $12 billion a year](http://time.com/4692075/access-to-most-effective-birth-control-could-save-12-billion-a-year-study/) If all American women had access to really effective [birth control](http://time.com/4108686/birth-control-methods-how-work/), like the IUD or implant, cost savings could sweep the country. Providing that level of access, however, could be a challenge. ## [Should I worry about flu vaccine side effects?](http://time.com/4696950/flu-vaccine-side-effects/) Some years the flu vaccine is more effective than others, but it’s still important to get your yearly shot. Scientists explain [why you shouldn’t worry](http://time.com/4696950/flu-vaccine-side-effects/) about the side effects. ## [Americans are eating too much bacon and too few nuts](https://time.com/4694883/bacon-nuts-soda-heart-disease-study/?xid=newsletter-health/) A new report shows people could live longer if they cut back on certain foods and added other ones. Keep [these two foods](https://time.com/4694883/bacon-nuts-soda-heart-disease-study/?xid=newsletter-health/) in the mind the next time you pick up your weekly groceries. 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