Weight training 101. Weight training is a type of strength training that uses weights for resistance. Weight training provides a stress to the muscles that causes them to adapt and get stronger, similar to the way aerobic conditioning strengthens your heart.ou can see significant improvement in your strength with just two or three 20- or 30-minute weight training sessions a week. That frequency also meets activity recommendations for healthy adults.
Interesting Facts about Maya Sites and Cities. 1  Many of these cities can be visited today. Some of them, such as Chichen Itza and Tikal, are considered UNESCO World Heritage Sites. 2  Around 1.2 million people visit the Chichen Itza site each year. 3  Archeologists have found at least thirteen different ball courts built in the city of Chichen Itza. Other important Maya city-states include Coba, Uxmal, Mayapan, Tulum, Palenque, and Kabah. Palenque was once known as the Red City because its buildings were all painted red.
Maya The Maya were inhabitants of the Yucatan Peninsula whose civilization was at it's height from AD 300 to AD 900. Their civilization included a unique system of writing, math, architecture, and astronomy.