Joint Noise: Popping and Cracking

Judo

Jump Rope Training

Juvenile Obesity

Karate

Knee: Anatomy and Physiology

Knee: Genetic and Non-Athletic Conditions Affecting Performance

Knee Injuries

Lacrosse

Lactic Acid and Performance

Liver Function

Long Jump

Longevity

Low Back Pain

Low-Carbohydrate Diets and Athletic Performance

Low-Impact Cardiovascular Exercise

Lower Leg Anatomy

Lower Leg Injuries

Luge

Maccabiah Games

Magnesium

Malnutrition

Massage Therapy

Mature Athletes

Mental Stress

Metabolic Response

Minerals

Modern Pentathlon

Mormon Tea

Motivational Techniques

Motocross or Moto X

Jenks, Herbert

Jones, Arthur

Jordan, Michael

Joyner-Kersee, Jacqueline

Karolyi, Bela

Klein, Gary Gordon

Lauterbur, Paul Christian

Leavitt, J. Noxon

Ledley, Robert Steven

Lennon, Boone

Leslie, Lisa Deshaun

Lettner, Rudolph

Lutz, Alois

Manley, Effa

Maxwell, Brian

McKay, Jim

Mikan, George Lawrence

Miley, Patrick

Miller, Hinda