Up, Up, and Away (Exercises to Improve Your Vertical Jump)

I don't know if there's something strange in the air lately, but for whatever reason, I've gotten a lot of questions about how to improve a vertical jump. Some individuals are naturally gifted with hops, but for the rest of us who need to work hard to become more powerful, we have to add more explosive movements into our routines. If you want to sky like Jordan, you want to make sure you're using the correct exercises.

This could be you! (Don't quote me on that, though...)

So what determines how high you can jump? There are a couple of factors, but I'll name the most pertinent:

• Muscle fiber distribution. Okay, so, in a nutshell, you have two different types of muscle fibers: type I and type II. Type I fibers (also known as slow twitch), do not fatigue easily. An endurance athlete will have well-developed type I fibers. Think: marathon runner. Type II fibers (also known as fast twitch) are split up into type IIa and IIb, and type IIb is the most easily fatigued. Someone with a higher percentage of type IIb fibers would be a 100 meter sprinter or a javelin thrower. Movements that are really short in nature require more speed and power. The fiber makeup of a muscle is determined by your genetics, but your training can help express and further develop either fast twitch or slow twitch fibers. If you train in an explosive, high-intensity manner, you are going to develop your fast twitch fibers to the best of your genetic ability.
• Rate of force development. This builds on the first bullet point. Let's say you tried to do a power clean for the first time. Initially, while you're learning the movement, you will probably pretty slow moving under the barbell. Two years later, your bar speed will be significantly faster. Granted, you've also become more competent and confident with the movement, and you are stronger, but your rate of force development (RFD) has improved significantly. How quickly you can express force is incredibly important in working your ups.

Now that the bulk of the science-y stuff is out of the way, we can get to the meat of the article: here some exercises that will help you leap tall buildings in a single bound. (Actually, maybe don't try to jump buildings just yet...)

1. Back squats (I have faith I don't need to post a video for this one...)
2. Power cleans
3. Power snatches
4. Push jerks
5. Depth jumps
6. Jumping lunges
7. Bulgarian split squat jumps
8. Low hurdle hops
9. Barbell jumping squats (no need to go heavy, here. Maybe 20-30% of your best squat.)
10. Barbell pogo jumps (similar as the previous exercise, but not as much hip/knee bend)

Ideally, we want to train strength in conjunction with plyometrics. For example, a six week study by Adams and his colleagues found that individuals who performed strength and plyometric exercises, saw a greater increase in vertical jump than the strength group and the plyometrics group alone: 

"Examination of the mean scores shows that the [strength] group increased 3.30 centimeters in vertical jump, the [plyometrics] group increased 3.81 centimeters and the [strength/plyometrics] group increased 10.67 centimeters. The results indicate that both [strength] and [plyometric] training are necessary for improving hip and thigh power production as measured by vertical jumping ability."

 A 10.67 centimeter increase in vertical jump in only 6 weeks is pretty solid! Basically, just jumping a lot will increase your jumping height, but if you perform strength training on top of that, your results will be significantly better.

If you want to get the most bang for your buck, Olympic weightlifting (snatch, clean, and jerk) movements are superior. "Olympic [weightlifting] exercises seemed to produce broader performance improvements than [vertical jump] exercises in physically active subjects," found Tricoli et. al. They continue to say, "groups using the [weightlifting] program increased [10 meter sprinting speed] more than those using the [vertical jump] program." So, not only did these movements effect the jumping height of the test subjects, but it also made them sprint faster!

In short, if you're looking to improve your jumps, try the exercises in the above list. Both strength training and plyometric training can be combined so that you can slam dunk like the pros in no time.

Works Cited:

1. Adams, Kent, John P. O'shea, Katie L. O'shea, and Mike Climstein. "The Effect of Six Weeks of Squat, Plyometric and Squat-Plyometric Training on Power Production." J Strength Cond Res The Journal of Strength and Conditioning Research 6.1 (1992): 36. Web.
2. Chelly, Mohamed Souhaiel, Mourad Fathloun, Najet Cherif, Mohamed Ben Amar, Zouhair Tabka, and Emmanuel Van Praagh. "Effects of a Back Squat Training Program on Leg Power, Jump, and Sprint Performances in Junior Soccer Players." Journal of Strength and Conditioning Research 23.8 (2009): 2241-249. Web.
3. Makaruk, Hubert, and Tomasz Sacewicz. "Effects of Plyometric Training on Maximal Power Output and Jumping Ability." Human Movement 11.1 (2010): n. pag. Web.
4. Tricoli, Valmor, Leonardo Lamas, Roberto Carnevale, and Carlos Ugrinowitsch. "Short-Term Effects on Lower-Body Functional Power Development: Weightlifting vs. Vertical Jump Training Programs." J Strength Cond Res The Journal of Strength and Conditioning Research 19.2 (2005): 433. Web.

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How Bigger Hamstrings Will Improve Your Athleticism and Prevent Injury

Let's talk about everyone's favorite chain: the posterior chain. So many songs have been written about it, but yet, some people oddly neglect to sufficiently train the glutes and hamstrings.

With this overwhelming abuse of the quadriceps complex, it is important that lifters prioritize isolation of the hamstring muscles to balance out the discrepancy in strength. Hamstring strength can play a role in improved power output, running economy, and may even reduce the risk of injuries like ACL tears.

As much as I love squats (and believe them to be one of the most beneficial exercises), the squat does not actually activate the posterior chain as much as many people think. In fact, many people squatting are quad-dominant, and under-utilize the gluteus maximus.

Before I elaborate, we need to review a little bit of anatomy. The muscles we refer to as the "hamstrings" are actually three separate muscles: the biceps femoris (which has a long head and a short head), the semimembranosus, and the semitendinosus. These two joint muscles work together to flex the knees and extend the hips.

Now that that's out of the way, we can talk about how these muscles affect performance. Since they act as hip extensors, strong hamstrings are going to be crucial for a high jump and a fast sprint. A 2007 study on sprinters concluded that "[...]the muscles mainly responsible for forward propulsion in full speed sprinting are the hamstrings, the glutaeus maximus and the adductor longus. The hamstrings are singled out as the most important contributors to produce highest speed levels." Essentially, an athlete with well-developed hamstrings will be able to horizontally accelerate much faster than an opponent with weaker hamstrings. Each stride will allow him to generate greater hip extension, getting more power as he straightens his legs. While quadriceps strength is necessary, it is the posterior chain that allows him to push harder off of the ground.

Similarly, another study found that runners with a smaller hamstring-to-quad ratio, meaning that there was not as big of a strength/size disparity between the two muscles, had a better running economy. This balance between the quadriceps and the hamstrings allowed the runners to be more efficient in their cadence. It was deduced that "runners should consider implementing hamstring exercises to improve their f-H:Q (hamstring to quad) ratios."

Usain Bolt has some serious hamstring pump.

The muscles activated in jumping are very similar to those we recruit in sprinting. While sprinting is unilateral, jumping is a bilateral movement. The extension of the hips, knees, and ankles, however, is much the same.

A four week study on males (with no strength training experience) found that the Nordic hamstring exercise (which I will show you later in this article) "[produced] favourable neuromuscular adaptations for the possible prevention of hamstring injuries while enhancing performance in athletic, untrained males." Using this exercise, on average, their vertical jump heights increased by about 6.3 cm in a month! That's pretty substantial. Granted, these are untrained individuals, but athletes could still reap some benefits from building the hamstrings.

I am a firm believer that a stronger, all-around, individual will be more resilient to injury. There is a decent amount of evidence to support the idea that hamstring strengthening can prevent the incidence of hamstring pulls, ACL tears, and other such injuries.

Askling et. al. tested hamstring injury in high-level soccer players. He put the players on an eccentric hamstring strengthening protocol 1-2 times a week for 10 weeks. "The results showed that the occurrence of hamstring strain injuries was clearly lower in the training group (3/15) than in the control group (10/15). In addition, there were significant increases in strength and speed in the training group." So the players got stronger, faster, and stayed injury free. What more could an athlete or a coach want!?

Here's the part you've been waiting for--the exercise section:

1. Russian leg curls
2. Good-mornings
3. Hip extensions (add weight if necessary)
4. Single leg RDL
5. Barbell hip thrusters
6. Stability ball leg curls 
7. Single leg sliding leg curl (advanced)
8. Slow eccentric RDLs
9. Reverse hypers
10. Stiff legged deadlifts

Not only will you have a better-looking rear-end, you'll be stronger, faster, and more injury resistant. Sounds like a win, win, win to me. Build those posterior chains!

Works Cited:

1. Askling, C., J. Karlsson, and A. Thorstensson. "Hamstring Injury Occurrence in Elite Soccer Players after Preseason Strength Training with Eccentric Overload." Scandinavian Journal of Medicine and Science in Sports Scand J Med Sci Sports 15.1 (2005): 65. Web.
2. Blazevich, Anthony John. "Optimizing Hip Musculature For Greater Sprint Running Speed." Strength and Conditioning Journal 22.2 (2000): 22. Web.
3. Clark, Ross, Adam Bryant, John-Paul Culgan, and Ben Hartley. "The Effects of Eccentric Hamstring Strength Training on Dynamic Jumping Performance and Isokinetic Strength Parameters: A Pilot Study on the Implications for the Prevention of Hamstring Injuries." Physical Therapy in Sport 6.2 (2005): 67-73. Web.
4. Mjolsnes, Roald, Arni Arnason, Tor Osthagen, Truls Raastad, and Roald Bahr. "A 10-week Randomized Trial Comparing Eccentric vs. Concentric Hamstring Strength Training in Well-trained Soccer Players." Scandinavian Journal of Medicine and Science in Sports Scand J Med Sci Sports 14.5 (2004): 311-17. Web.
5. Moir, Gavin, Ross Sanders, Chris Button, and Mark Glaister. "The Effect of Resistance Training on Hip-Knee Continuous Relative Phase Measures during Accelerative Sprinting." Medicine & Science in Sports & Exercise 39.Supplement (2007): n. pag. Web.
6. Nuckols, Greg. "Hamstrings: The Most Overrated Muscle for the Squat 2.0 • Strengtheory." Strengtheory. N.p., 29 Apr. 2015. Web. 27 May 2015.
7. Sugiura, Yusaku, Tomoyuki Saito, Keishoku Sakuraba, Kazuhiko Sakuma, and Eiichi Suzuki. "Strength Deficits Identified With Concentric Action of the Hip Extensors and Eccentric Action of the Hamstrings Predispose to Hamstring Injury in Elite Sprinters." J Orthop Sports Phys Ther Journal of Orthopaedic & Sports Physical Therapy 38.8 
8. Sundby, Øyvind H., and Mark L.s. Gorelick. "Relationship Between Functional Hamstring." Journal of Strength and Conditioning Research 28.8 (2014): 2214-227. Web.

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1 Thing Athletes Could Learn from Dancers

Lifters and athletes should watch "Swan Lake" and take notes. In one Tchaicovsky's most famous works, the ballerinas hop lightly and gracefully across the stage. Every movement the dancers make is incredibly precise and effortless.

From a young age, dance coaches repeatedly drill this pattern within their students. The goal for a high level dancer is to appear weightless and be light on the feet. The ballerinas develop a tremendous amount of bodily awareness through years of intense training.

Channel your inner ballerina. Learn to be light on your feet.

Now, I've had the privilege to work with and observe both young athletes and professional or high level athletes. One of the most surprising things I have noticed in many of these individuals is the inability to absorb a load efficiently.

Basketball players, tennis players and other athletes do not know how to land well. I've seen many fast, agile, powerful and strong people who seem to have lead feet. I hear my friends stomping up the stairs or dragging their feet on the floor. I watch runners slam their heels on the treadmill with each stride.

For some, this fault is a matter of awareness, while others may need to work on motor control.

Safe, efficient movement necessitates control. Hurling your body onto the box for a box jump is not going to improve your athleticism. Instead, learning proper sequencing (heel-toe to toe-heel) will spare your joints and allow you to float over the box.

At NYU Langone, they performed a study on both athletes and dancers. “We realized that dancers aren’t getting ACL injuries, yet they jump a lot,” Dr. Liederbach said. In sports like soccer and basketball, ACL tears are common. Nearly 200,000 people per year are destroying their ACLs, and it may be preventable in some cases.

Look at the landing position of these two. Which looks more stable?

Many of the dancers in this study plantar-flexed (or pointed the toes) upon landing, whereas the athletes absorbed the impact with the entire foot. Additionally, there was less of a valgus knee in the dancers on a single-leg jumping test than with the athletes tested. These deficiencies may contribute to the higher percentage of ACL tears in athletes as compared with dancers.

Well-trained dancers preform drills learning how to land gracefully, and many of them practice barefoot or wearing minimal footwear. Athletes, however, may not (depending on the coach) have the same type of instruction.

Over the summer, I was working with tennis players at a camp from the ages of 10-13. One of the most important elements of our sessions was learning how to land properly. I had them do a series of different jumping drills, all with an emphasis on "quiet" landings. I reviewed the sequencing of the movement from the start until the finish of the jump, and I had them repeat the drills until I was satisfied with the outcome. I believe proper jumping mechanics are an absolute priority for athletes of all ages (and anyone who's looking to improve power output). My goal is to make my clients more explosive while maintaining control. There is no use in having someone try for a 45" box jump is he or she cannot control the landing.

If you are utilizing explosive movements (box jumps, jumping lunges, broad jumps, etc.) in your workouts, make sure you place an emphasis on bodily awareness and mechanics. You may save your joints from jarring landings and improve your overall level of athleticism! Channel your inner ballerina!


Works Cited:

1. Dufek, Janet S., and Barry T. Bates. "Biomechanical Factors Associated with Injury During Landing in Jump Sports." Sports Medicine 12.5 (1991): 326-37. Web.
2. Liederbach, Marijeanne. "Incidence of Anterior Cruciate Ligament Injuries Among Elite Ballet and Modern Dancers." The American Journal of Sports Medicine 36.9 (2008): 1778-799. Web. 12 Mar. 2015.

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