If you’re trying to bulk up or get more defined arms, you might be wondering: Why do some people seem to gain muscle more easily than others? Scientists have been wrestling with this riddle for a while. One concern is ‘non-responders,’ the people who don’t get any benefit at all from strength training. Researchers have discovered that tweaking their fitness routine just slightly can result in big improvements. For most of us, though, the basics remain the same: Lift some weights, do it consistently and don’t sweat the details. Read more.

Also this week: Don’t get bugged out this summer. We share some expert advice for de-bugging your outdoor space without hurting yourself, your pets or other wildlife. Read more.

From food and drink to parenting and relationships, The Globe and Mail publishes several newsletters designed to keep you healthy, active, and informed. Visit our signup page to subscribe.