A short-term metric based off a combination of frequency, duration and intensity of the workouts performed during the last week of training. It indicates the level of fatigue.
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AT - Aerobic Threshold
The effort level you can sustain for hours while breathing easily, just before lactate levels rise. It builds endurance.
ATG - Ass to Grass
The squat movement of lowering the body until the glutes almost touch the ground. It requires a significant amount of mobility, flexibility and balance, particularly in the hips, ankles, and knees. Also known as **ATG Split Squat**.
A number on a paper-like and water resistant material that identifies a runner and the event that they are racing in. It is attached to the front of the clothing so that it is visible to the race staff and the race photographer.
BMR - Basal Metabolic Rate
The minimal number of calories your body needs to function at a basic level. This includes maintaining all your cells and essential bodily functions, like breathing, blood circulation and body temperature. BMR varies from person to person based on several factors.
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BQ - Boston Qualifier
A badge granted to a race that fulfills the requirements to qualify runners to run the prestigious Boston Marathon.
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An emergency life-saving procedure performed when a person's breathing or heartbeat has stopped. It combines chest compressions and rescue breaths to manually pump oxygenated blood to the brain and vital organs until medical professionals take over.
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CTL - Chronic Training Load
A weighted, rolling average of your daily Training Stress Score (TSS) over a 42-day (6-week) period. A high CTL indicates you have sustained a heavy, adaptable training workload, while a low CTL means you have lower fitness or are detrained
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CoT - Cut-off Time
The maximum allotted time a participant has to complete a race or reach a specific checkpoint. Arriving after this time results in disqualification and removal from the course, often enforced due to public road reopening schedules or event logistics.
A badge of honor among runners. It refers to finishing a race in the absolute last place, outlasting the cutoffs, and proving your endurance.
DNF - Did Not Finish
When a runner starts the race, but does not finish.
DNS - Did Not Start
When a runner signs up for a race but doesn't start.
DQ - Disqualified
When a runner gains a competitive advantage by not following the rules of the race.
Drafting
When a runner uses another runner as a barrier to wind and weather to maintain their pace.
Drop Bag
Any sealed container, from a sac to a small lidded bin, that contains items that a runner would want to access during a race but not necessarily carry with them from the start.
The sum of every increase in elevation (when going up a hill) throughout an entire race. It is sometimes also known as cumulative gain.
EPOC - Excess Post-exercise Oxygen Consumption
The extra oxygen your body needs to recover, repair, and return to its normal resting state after stenuous exercise. With the extra oxygen, your body continues to burn calories at a sligtly elevated rate to hours after a workout is finished.
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Waterproof technology that helps your feet to stay dry and comfortable in wet conditions. Shoes branded with GTX are great for rainy runs or puddle-filled trails.
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Gear
Any clothing, shoes, or accessories needed pre, during, or post-race.
GOAT - Greatest Of All Time
The denomination of an athlete who won more competitions than any other athletes in the past.
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GTS - GuideRailsTM Technology System
Two pieces of firmer foam placed on either side of the heel, creating a support system that helps keep excess movement in check. Shoes branded with GTS are support shoes.
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A light worn around the head when its dark outside. Headlamps come in different lumen options. The higher the lumens, the more bright the headlamp will be. Some headlamps re-charge, others need new batteries.
HR - Heart Rate
The number of times a heart beats during one minute. It varies according to the intensity of an activity.
HRM - Heart Rate Monitor
A device equipped with a sensor capable of detecting heartbeats.
HRV - Heart Rate Variability
The variation in time intervals between heartbeats. Measured in milliseconds. It reflects autonomic nervous system balance and provides insights into overal health and stress levels.
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HIIT - High-Intensity Interval Training
Workout that alternates between short bursts of intense exercise and brief periods of recovery.
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Hypernatremia
Too much water loss or too much sodium gain. Symptoms are excessive thirst, extreme fatigue, and possibly confusion.
Hyponatremia
Low sodium concentration. Symptoms can be absent, mild or severe. Mild symptoms include a decreased ability to think, headaches, nausea, and poor balance.
A race that is organized in such a way that participants start at regular intervals and are ranked according to the time taken by each to reach the finish line.
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TSB - Training Stress Balance
The balance between CTL (Chronic Training Load) and ATL (Acute Training Load) as an attempt to balance how fit you are over the long term with how fatigued you are from recent workouts.
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The maximum amount of oxygen your body can use during exercise. By improving your VO2 Max, you can increase your aerobic capacity, and boost your endurance.