Lifting less weight more times is just as good at building muscle as doing it with heavy weights, says a new finding.

"We found that loads that were quite heavy and comparatively light were equally effective at inducing muscle growth and promoting strength," says Cam Mitchell, the study's co-author and a doctoral candidate in kinesiology at McMaster's University in Ontario, Canada. 

The research suggests that the key to muscle gain is working to the point of fatigue and challenges the widely held belief that training with heavy weights is best for muscle growth, the Journal of Applied Physiology reports.

"Many older adults can have joint problems which would prevent them training with heavy loads," says Mitchell. "This study shows that they have the option of training with lighter and less intimidating loads and can still receive the benefits."

For the study, a series of experiments were conducted on healthy and young male volunteers to measure how their leg muscles reacted to different forms of resistance training over a period of 10 weeks, according to a McMaster's statement.

The researchers first determined the maximum weight each subject could lift one time in a knee extension. Each subject was assigned to a different training program for each leg.

In all, three different programmes were used in combinations that required the volunteers to complete sets of as many repetitions as possible with their assigned loads -- typically eight to 12 times per set at the heaviest weights and 25-30 times at the lowest weights.

The moon is set to get a lot bigger and brighter than average this weekend as it officially becomes full on Saturday (May 5) at 11:35 pm EDT.

And since this month’s full moon coincides with the moon’s perigee — its closest approach to Earth — it will also be the year’s biggest.

The moon will swing in 221,802 miles (356,955 kilometres) from our planet, offering skywatchers a spectacular view of an extra-big, extra-bright moon, nicknamed a supermoon, the Discovery News reported.

According to meteorologist Joe Rao, besides moon’s perigee coinciding with full moon this month, this perigee will be the nearest to Earth of any this year, as the distance of the moon’s close approach differs by about 3 percent. 

This occurs because the moon’s orbit is not perfectly circular.

This month’s full moon is due to be nearly 16 percent brighter than average. Conversely, later this year on November 28, the full moon will coincide with apogee, the moon’s farthest approach, offering a especially small and dim full moon.

Though the rare appearance of this month’s full moon may be surprising to some, there’s no reason for alarm, scientists cautioned. 

The slight distance variation is not enough to cause any earthquakes or extreme tidal effects, experts asserted.

However, the normal tides around the world will be mostly high and low. At perigee, the moon will exert about 42% more tidal force than it will during its next apogee two weeks later, Rao added.

The last supermoon appeared in March 2011.