You’re probably very familiar with this first shoulder muscle, the deltoids, or “delts.” A triple-headed muscle (anterior/front, lateral/side, and posterior/rear) that forms the “cap” on the shoulder, the delts each originate at different points along the scapula or collarbone, and come together nearly halfway down the …

When you want to bend your elbow, your biceps muscle contracts (Figure below), and, at the same time, the triceps muscle relaxes. The biceps is the flexor, and the triceps is the extensor of your elbow joint.

Muscles that move the shoulder and arm include the trapezius and serratus anterior. The pectoralis major, latissimus dorsi, deltoid, and rotator cuff muscles connect to the humerus and move the arm.

The upper arm is located between the shoulder joint and elbow joint. It contains four muscles – three in the anterior compartment (biceps brachii, brachialis, coracobrachialis), and one in the posterior compartment (triceps brachii).

“Our bodies are surprisingly resilient in many situations, but rapid acceleration is not one of them. While the human body can withstand any constant speed—be it 20 miles per hour .”

very fast – in a relatively short time; “she finished the assignment in no time” in no time. Based on WordNet 3.0, Farlex clipart collection.

The 8 fastest man-made objects ever

• NASA X-43 – 7,000 mph. An X-43A artist concept drawing. (
• Space Shuttles, 17,500 mph. The Space Shuttle Columbia on lift-off. (
• Apollo 10 Capsule – 24,791 mph.
• Stardust – 28,856 mph.
• Voyager 1 – 38,610 mph.
• An iron manhole cover – 125,000 mph.
• Helios Satellites – 157,078 mph.

Some common synonyms of speedy are expeditious, fast, fleet, hasty, quick, rapid, and swift.

Usain Bolt’s

A new study that tracked ultramarathon running times worldwide over two decades found that women tend to outrun men, after 195 miles. On average, women are 0.6% faster than men during super-long races that stretch towards (and beyond) the 200 mile mark.

A noncompetitive, relatively in-shape runner usually completes one mile in about 9 to 10 minutes, on average. If you’re new to running, you might run one mile in closer to 12 to 15 minutes as you build up endurance. Elite marathon runners average a mile in around 4 to 5 minutes.

45 km/hMaximum, Running

40 MPH: The fastest speed humans can run. The current fastest human in the world is Usain Bolt, who can run at nearly 28 miles per hour—some streets have lower speed limits than that! Bolt holds the record for the 100-meter sprint, clocking in at 9.58 seconds, reports BBC.

A 2016 paper by Ryuta Kinugasa and Yoshiyuki Usami noted that the Guinness World Record for a human running 100 meters on all fours has improved from 18.58 seconds in 2008 (the first year the record was tracked) to 15.71 seconds in 2015.