"We have proof that aging doesn't have to be a downward slope. There's your chronological age-what the calendar says-and then there's your biological age, which is a measure of how well your body and brain are holding up for your chronological age. And there's mounting evidence that a healthy lifestyle can actually lower your biological age from the inside out. These healthy lifestyle changes-to your diet, exercise, and sleep habits and to how your deal with stress-are totally accessible to anyone and bring amazing results. How do we know? We combed the latest science and consulted with a dream team of advisors in health, fitness, nutrition and beauty to roll our findings into a simple Younger in 8 Weeks Plan. Then we tested it on 21 women ages 36 to 66 who'd been struggling with weight gain, lack of energy, loss of luster, and other common age-related issues."-

The revolutionary fitness plan for men. Are you ready to feel younger, fitter and stronger? Matt Roberts' Younger, Fitter, Stronger is a ground-breaking fitness manual designed for mid-life men. Follow this targeted, testosterone-boosting 8-week fitness plan to lose your gut, tone your body and feel 10 years younger. Drawing on more than 20 years of personal training experience with thousands of clients, Matt Roberts brings you a powerful combination of cutting-edge science and transformative workouts. The benefits and results speak for themselves: boosted energy, improved muscle mass, a revitalised sex drive, more restful sleep – even better-looking skin and hair. You'll look and feel as good – or better – than you did in your 20s. The day-by-day 8-week plan is based on ground-breaking recent studies that have discovered the anti-ageing benefits of boosting testosterone and human growth hormone (HGH) levels through the targeted use of exercise and diet. Raising levels of these hormones is key to maintaining health and fitness in mid-life, and it can be achieved.

A separate section of the journal, Molecular and developmental evolution, is devoted to experimental approaches to evolution and development.

Knock a staggering two decades off your biological age in only two months. Find out how old you really are with 13 simple tests, then set to working on improving your score with visible results in days. TURN BACK YOUR AGE CLOCK tells you everything you need to know to become your own anti-aging guru: how to transform your body inside and out with diet, beauty and workout plans; how to stay on track; and how to improve your overall health, fitness and longevity.