Army Studies Workout Supplements After 2 Deaths
The military has removed dietary supplements containing the ingredient dimethylamylamine from stores on its bases, though the products are widely available elsewhere in the country.

Brown Fat Burns Ordinary Fat, Study Finds
In separate studies, researchers have determined that in cold conditions, people’s calorie-gobbling brown fat uses ordinary fat as fuel — and that exercise may convert ordinary fat to brown fat.

Vital Signs: Study Finds No Childhood Obesity Link to School Junk Food
No matter how researchers looked at data, they could not uncover a correlation between childhood obesity and the sale of sweets and salty snacks in public schools.

Recipes for Health: Risotto With Red Kale and Red Beans — Recipes for Health
Despite what you may have heard about risotto, this colorful dish doesn’t require constant stirring.

Personal Best: Workouts Have Their Limits, Recognized or Not
Physiologists are fretting over an increasing focus on extreme exercise among some recreational athletes.

The Big Picture: Young, Obese and Getting Weight-Loss Surgery
The push toward operations like Lap-Band surgery on the young has brought some resistance from doctors who say it is too drastic on patients whose bodies might still be developing.

How Yoga Can Wreck Your Body
Popped ribs, brain injuries, blinding pain. Are the healing rewards worth the risks?

The Bay Citizen: Unreported Food Poisoning at San Francisco Restaurant Spotlights Absence of Law
Food poisoning at a Mission District restaurant puts a spotlight on the absence of any law requiring businesses to report such incidents.

Devices to Keep Track of Calories, Lost or Gained
Monitors designed to gauge physical activity and subsequent calories burned might become a silver bullet for weight loss and for sticking to New Year’s resolutions.

Vegans Muscle Their Way Into Bodybuilding
Vegans make up only a sliver of the thousands of competitive bodybuilders in the United States, but they have been a steady presence since the 2000s.

F.D.A. Restricts Cephalosporin Antibiotics in Livestock
The Food and Drug Administration said the widespread use of cephalosporins may have contributed to the development of drug-resistant bacteria that infect humans.

Vital Signs: Vitamins B, C, D and E and Omega-3 Strengthen Older Brains
Higher blood levels of omega-3 fatty acids, vitamin B, vitamin C, vitamin D and vitamin E are associated with better mental functioning in the elderly, a study shows.

Well: A Recipe for Simplifying Life: Ditch All the Recipes
In instructing readers on the art of intuitive cooking, the chef and food writer Tamar Adler offers not just cooking lessons, but a recipe for simplifying life.

New Jersey Dining | Health Club Cafes: Cafes at Health Clubs Stress Eating Right
Many on-site cafes, geared to serve fitness-conscious exercisers with choices like vegetarian and gluten-free cuisine, are open to nonmembers, too.

Questions About Organic Produce and Sustainability
Even as more Americans buy foods labeled organic, the products are moving away from a traditional emphasis on local growing and limited environmental strain.

The Fat Trap
In the battle to lose weight, and keep it off, our bodies are fighting against us.

Eat: No Meat, No Dairy, No Problem
Going semi-vegan: a resolution with no downside.

Advertising: A Campaign to Draw Doctors to a Weight-Loss Program
With Medicare set to start reimbursing physicians for obesity treatment in January, a new campaign is directing ads both at patients and at physicians.

Skin Deep: A Yoga Devotee Finds a New Guru in a Personal Trainer
Seeing the light and getting lighter, a yoga devotee turns to a personal trainer to get in better shape.

Heart Rate Monitors Fine-Tune Soccer Players’ Fitness
The Connecticut soccer team has been at the forefront of using heart rate monitors to create optimal conditioning for its players.

Smaller Gyms Scramble for Spaces in New York
Niche gyms, smaller outlets offering personal training sessions or focusing on specific exercises, have struggled to find real estate in New York City.

Swimming From Cuba to Key West, Without Leaving the Water
Diana Nyad, a marathon swimmer, hopes to be the first person to cross from Cuba to Key West without a shark cage.Diana Nyad, 61, aims to set a record by swimming across the shark-infested Straits of Florida in 60 hours.

Vital Signs: Beer and Martinis: Just as Effective as Wine for Longevity?
A new analysis suggests that martinis and beer may be just as effective as wine at extending life.

SchoolBook: Obesity Rate Falls for New York Schoolchildren
The decline, though slight, offers hope that the tide may be turning on one of the nation’s most stubborn health issues.

The Bay Citizen: Children’s Hospital and Research Center Oakland Ranked Lowest in Food Health Study
Children’s Hospital and Research Center Oakland ranked lowest on a study of what 14 California hospitals sold in their cafes.

A Hard Turn: Big-Rig Drivers Focus on Getting Healthy
Beset by insurance costs and desperate to make sure that drivers pass health tests, trucking companies and industry groups are working to persuade them to change their habits.

Personal Health: Communities Learn the Good Life Can Be a Killer
The sedentary comforts of suburban expansion have fostered obesity, poor health, social isolation, excessive stress and depression.

Really?: The Claim: Never Go to Bed Angry
Going to sleep after experiencing negative emotions appears to reinforce or "preserve" them, research suggests.

HEALTH: Gym Class: Ballet Aerobics
The Times's fitness guinea pig, Karen Barrow, tries a Figure 4 barre workout. For more Gym Class videos, go to nytimes.com/well.

HEALTH: Gym Class: The Indo Board Workout
Karen Barrow, The Times’s fitness guinea pig, tries out the Indo Board, a workout geared toward surfers and snowboarders.