NFL (Burpees)
Geography (Pushups)
Space (Situps)
Science (Squats)
Music (Leg Lifts)
3

In 2000, this quarterback made the NFL Pro Bowl for the Tennessee Titans

Steve McNair

3

The Dingo is a free range dog found mainly in this country

Australia 

3

The most common type of star found in the Milky Way

Red Dwarf Stars

3

It's the chemical formula for table salt

NaCl (Sodium Chloride)

3

This mechanical device is used by musicians to keep time

Metronome

6

This is the year that the Miami Dolphins finished 17-0, with 14 regular season wins and 3 post season wins including the Super Bowl

1972

6

This is the only Sea on Earth with no coastline

Sargasso Sea

6

The largest type of star in the universe

Hypergiant stars

6

The number of bones in a giraffe's neck

7 bones

6

In 2004 he won a song of the year Grammy for "Daughters"

John Mayer

9

This sportscaster posted an NFL coaching record of 103-22-7

John Madden

9

This is the oldest city in the United States

St. Augustine, FL
9
The Earth is closest to the sun in this month

January

9

The bark from this tree is used to produce aspirin

The white willow tree

9

Trumpet players use an object called a mute; a French horn player just puts this in his instrument

His hand

12

The number of teams in the NFL that are named after birds

5 (Falcons, Eagles, Ravens, Cardinals, Seahawks)

12

The African country that served as the setting for Tatooine in Star Wars

Tunisia

12

Saturn's largest moon

Titan

12

This type of bond involves the sharing of electron pairs between different atoms

Covalent bond

12

In 1983 this singer hit No. 12 with the song 1999

Prince

15

The Washington Football Team (Previously Washington Redskins) played in this city before relocating to D.C.

Boston, MA

15

The only U.S. state's capital city without a single McDonald's Restaurant 

Montpelier, VT

15

The coldest place in the universe

The Boomerang Nebula

15

This English chemist and physicist discovered hydrogen

Henry Cavendish

15

Webster's defines this word as a chord of three tones consisting of a root with its third and fifth

A triad