Making and taking a hit chest to chest, instead of skull to skull, is easier to remember if you're not wearing a helmet, say University of New Hampshire Wildcat football players.
Jack Rodolico/New Hampshire Public Radio
Ray Copeland, a football coach at Bishop McGuinness High School, puts his players through a workout in Oklahoma City in 2007. As is often the case in much of the U.S., the first day of high school football practice that year began in a heat wave.
University of Louisville cheerleaders hurled into the air during the first half of the NCAA Final Four tournament college basketball semifinal game against Wichita State in April.