High protein is less of a threat for mice that strength train

What's the news: Mice on high protein diets were metabolically healthy if they engaged in strength training.

Why should we believe it: This news is based on a new study published last week by scientists at University of Wisconsin at Madison. The scientists took a bunch of lab mice and divided them into four groups based on high/low protein intake and progressive strength training/"sham exercise." Results:

• Mice fed low protein diets had better metabolic profiles in the "sham exercise" group.

• Among the high protein mice, strength training protected against fat and body weight gain.

Why this is a big deal: For the past few decades, high protein diets have been a popular recommendation. However, evidence is mounting that high-protein diets are metabolically damaging and might even age you faster.

At the same time, many healthy and fit people consume diets high in protein. The present study offers a clue why — it might have more to do with the exercise these people do, rather than their diet.

So what specifically can you do now: First, remember that this is a mouse study. It might not translate to human beings.

Second, if you are currently consuming a high protein diet, consider that a more moderate protein diet might be better for you.

Third, if you are not doing strength training, start. It will benefit you if you're not eating lots of protein, and it will benefit you if you are.