High Intensity Interval Training in Deep Water

There are those who are passionate about deep-water exercise (and I am one of them). But for those who have never tried it, there is a degree of mystery about it. One of the concerns I hear most often is: “I don’t think I could tread water for an entire one-hour class.” You don’t have to! Everyone should wear a flotation belt in deep water. The second concern I hear is: “Can you get a workout in deep water as intense as the workout in shallow water? And the answer is definitely, yes!

Let’s back up to that flotation belt. It needs to be attached tightly around your waist so that it doesn’t slide up under your arm pits. And then you need some practice stabilizing, since your feet don’t touch the pool floor and there may be a tendency to tip forward or backward. The core muscles have to learn to contract to keep you upright, which is why most people see improvements in their core strength after taking a deep-water class for awhile. The second thing you need to learn is to continue to maintain that upright position in which you work against the water’s resistance with your entire body from the neck down, instead of trying to streamline by rounding forward, as in the drawing with the big X through it. In this position the bones of your spine are compressed on the front side, which is not good for the back.

Now, let’s talk about getting an intense workout in deep water. This means high intensity interval training (HIIT) where you work at 80-90% of your maximum effort for short periods followed by periods of active recovery. Achieving maximum effort requires focus. Your focus determines the number of muscle fibers that need to contract and the speed of those contractions. It’s important, then, that you are actively engaged, not reminiscing about vacation or chatting with another participant, when you are performing HIIT. The strategies for achieving high intensity in deep water are similar to the strategies in shallow water, but with some differences.

Step One: Start with the Base Moves. In deep water the base moves are jog, bicycle, kick, cross-country ski, and jumping jacks. These moves all have multiple variations. (1) Jog. You can jog with the feet hip distance apart or wide. You can cross the midline in front with an inner thigh lift or cross the midline in back with hopscotch. You can lift the knees in front or the heels in back. You can lean diagonally to the side or go all the way to side-lying. (2) Bicycle. Bicycle with the feet under you as if you are on a unicycle. You can bicycle tandem, with the feet pedaling in unison. You can lean diagonally to the side or go all the way to side-lying. (3) Kick. You can flutter kick, kick forward, kick across the midline, Cossack kick like a Russian dancer, or kick backward. (4) Cross-country ski. You can ski upright, add a tuck, lean diagonally to the side or go all the way to side-lying. (5) Jumping jacks. You can add a tuck or perform the jacks seated, with knees bent or in an “L” position. All the base moves can be varied by using different arm movements or different foot positions.

Step Two: Increase the Range of Motion. Large moves take more effort than smaller moves. Increasing the range of motion is one intensity variable. Get the knees high in your jog and pump the arms in big movements. Start your inner thigh lift with the feet wide apart and lift the inner thigh high. Start your hopscotch with the feet wide too. Bicycle in large round circles. Kick higher – front or back. Perform cross-country ski with your full range of motion, or do a helicopter ski, moving the legs in semi-circles around the body instead of in straight lines. Take your feet as wide as comfortably possible in your jumping jacks and cross the legs in the center. Focus on achieving your full range of motion. Depending your level of fitness, you may find large moves to be really intense. Alternate base moves with exercises using full range of motion for your intervals until that becomes easier.

Step Three: Add Speed. Faster moves increase intensity. The tendency, however, is to decrease the range of motion as speed is increased. You work much harder if you maintain the same full range of motion while speeding up. Pay attention to your exercises to avoid slowing down. Speed is a second intensity variable. Alternate base moves with faster exercises for your intervals until that becomes easier.

Step Four: Add Acceleration. There are two ways to do this. (1) Accelerate your leg movements toward center to lift your shoulders out of the water. This is called adding elevation. Examples are frog kick, breaststroke kick, cross-country ski, and tuck ski together (scissors kick). The body will rise and sink rhythmically. You can also use a scull to lift your shoulders out of the water with a jog, bicycle or flutter kick. Aim to stay elevated with your scull. (2) Accelerate against the water’s resistance, or add more force to the move. Take your jog to a steep climb by stretching out your arms and pressing alternating hands down while at the same time lifting the knees high and then pressing the heels down toward the pool floor, as if climbing a steep mountain with trekking poles. Lift your inner thigh with power as your press the opposite hand down forcefully toward the thigh. Bicycle with power as if you are climbing a hill in first gear. Perform a high kick powering the leg on the downward phase, or power both upward and downward. Kicks backward, cross-country ski and jumping jacks can all be performed with power. Be mindful about what you are doing because the harder you push against the water, the harder the water pushes back. Acceleration is a third intensity variable. Alternate base moves with accelerated moves for your intervals until that becomes easier.

Step Five: Combine Intensity Variables or Work in More than One Plane. One strategy for continuing to perform HIIT once you have achieved your fitness goals is to combine intensity variables. Go for full range of motion with power, elevation with speed, or power with travel continuing to use force as you move across the pool. Another strategy is to work in two or three planes at once. You can do this by alternating one move in the frontal plane, such as a frog kick with another move in the sagittal plane, such as a tuck ski together. A second way to work in multiple planes is to combine arm moves in one plane with leg moves in another plane. Examples include jumping jacks (frontal plane) with clapping hands (transverse plane); cross-country ski (sagittal plane) with arms sweeping side to side (transverse plane); and high kick (sagittal plane) clapping over the kick (transverse plane) then under the kick (frontal plane). Continue to focus on what you are doing, and your periods of high intensity will leave you breathing hard. You will need those periods of active recovery to catch your breath. For more information on interval training in both deep water and shallow water, including lesson plans using these five steps, see my book Water Fitness Progressions.

See you in the pool!

Author/Instructor Photo
Chris Alexander

Benefits of HIIT

Image result for pictures of water exercise

HIIT, or high intensity interval training, is popular in all kinds of fitness formats. HIIT was named the #1 Fitness Trend for 2018 according to the American College of Sports Medicine’s world wide survey. During HIIT the goal is to work so hard that it becomes difficult to breathe in enough oxygen to supply the demands of the muscles. You are working at 80-90% of your maximum effort. Once you get to 90% effort, your body’s demand for oxygen exceeds the oxygen supply available. This is called crossing the anaerobic threshold. Your body must now rely on energy sources that are stored in the muscles. Since there is only a limited amount of energy stored in the muscles, this level of intensity can only be sustained for a short time, ranging from a few seconds to 2 minutes, depending on your fitness level. The recovery period in anaerobic exercise is important. If the recovery period is shorter than the high-intensity period, then the body is unable to achieve full anaerobic recovery. Therefore, in most cases the recovery is longer than the work.

HIIT improves both aerobic and anaerobic fitness. It has also been shown to improve blood pressure, cardiovascular health, insulin sensitivity, cholesterol profiles, and abdominal fat and body weight, according to the American College of Sports Medicine. HIIT burns more calories than continuous cardiorespiratory training, especially after the workout. This occurs because the heart and lungs work hard to supply oxygen to the working muscles and after the exercise ends, the body has excess oxygen to consume. About two hours are needed to use up the excess oxygen. This post exercise period adds around 15% more calories to the overall workout energy expenditure.

To increase intensity for interval training in water exercise you can increase the range of motion, increase the speed without decreasing the range of motion, go into the suspended position, and add acceleration by jumping or performing the exercise with power. (See my previous blog post: Make Your Heart Stronger with Intervals.) However to go into HIIT you will need to use two of the intensity variables at once, such as full range of motion with power, or speed with jumping. Try adding power while traveling. Another strategy is to work in two planes at the same time. You can do this by alternating one move in the frontal plane, such as a frog jump, with another move in the sagittal plan, such as tuck ski. A second way to work in two planes is to combine a leg move in one plane with an arm move in a different plane. Examples include kick side to side (frontal plane) with arms sweeping side to side (transverse plane); cross-country ski (sagittal plane) with rotation, hands together (transverse plane); and high kick (sagittal plane) clap over the leg (transverse plane) and under the leg (frontal plane). When you are working at 80% of your maximum effort you are able to grunt in response to questions but can only keep up the pace for a short time. At 90% of your maximum effort you will feel like you can’t do this much longer.

Since periods of high intensity are alternated with periods of recovery, HIIT provides the exerciser the opportunity to experience the extra benefits of intense exercise without creating an experience that is negative or unpleasant. However, not everyone in a class is willing or able to do HIIT. Some may have an injury that prevents them from performing certain moves. Some may have a condition that makes working at that level contraindicated. Some just may not be able to push it hard that day. For safety’s sake, participants should always modify the intensity to a level that is challenging for them rather than trying to keep up with other participants.

My book Water Fitness Progressions has information about HIIT along with sample lesson plans that include high intensity intervals with a variety of ways to configure the intervals. To order the book from the publisher, click on the title. The book can also be ordered from Amazon.com  

See you in the pool!

Chris Alexander

Make Your Heart Stronger with Intervals

The way to make your heart stronger is to make it beat faster. Since there is a direct correlation between how fast your heart is beating and how fast you are breathing, making your heart stronger means exercising at a pace that makes you breathe faster than normal. Interval training is a popular way to meet this objective.

Interval training is alternating bouts of fast paced exercise with slower paced exercise. The fast pace is called work and the slower pace is called recovery. One period of work plus one period of recovery is called a set. A group of sets is called a cycle. The chart above shows a cycle of five sets of intervals. If you are jogging, your work might be running and your recovery could be walking. In a water exercise class, your work might be performing an exercise faster, but there are other ways to increase intensity.

The basic aquatic exercises of jog, kick, cross-country ski and jumping jacks can all be performed at a somewhat easy level. Your breath will be faster than standing still, but you can still do the exercises while talking or even singing. To increase the intensity to a moderate level, increase the range of motion, that is, make the moves larger. Your breath will be a little faster and although you will still be able to talk, it will be harder to sing. To increase the intensity to a somewhat hard level, increase the speed of the exercise. Try not to lose range of motion as you go faster. For many people, taking the exercise to a suspended position is also somewhat hard. With faster moves or suspended moves you may be able to talk, but you will be breathing hard enough that you won’t really want to talk. To work at a hard level, add acceleration. This could be by jumping but you can also perform the exercise with power. The harder you push against the water the harder the water pushes back. Power moves are slower but the effort is greater. At this level, you might be able to grunt in response to a question and you will feel like you can only keep that pace for a short time.

Click on this linkhttps://youtu.be/g5V0lzwTi40 to watch a video of the basic exercise of cross-country ski in shallow water along with the variations of increasing range of motion, increasing speed, going suspended, adding power, and adding rotation (a variation of a power move). Each variation is performed for 4 counts.

Click on this link https://youtu.be/ZDJnhaxP5cU to watch a video of the basic exercise of cross-country ski in deep water along with the variations of increasing range of motion, increasing speed, adding elevation (accelerating the legs toward center to lift the shoulders out of the water), adding power and adding rotation. Each variation is performed for 4 counts.

The work period and the recovery period of an interval can last for a few seconds up to a few minutes. Usually the recovery period is longer than the work period so that you can recover fully before starting the next work period, but you can have a reduced recovery period for an added challenge. Some ways to time the intervals are:

  • Interval 30: 30 seconds of work to 90, 60 or 30 seconds of recovery
  • Interval 40: 40 seconds of work to 80, 60 or 40 seconds of recovery
  • Interval 60: 60 seconds of work to 120, 90 or 60 seconds of recovery
  • Reduced Recovery Time: 1, 2 or 3 minutes of work to 30, 60 or 90 seconds of recovery
  • Rolling Intervals: work for 1 minute, increase intensity for 1 minute, and increase intensity again for another minute
  • Surges: work for 45 seconds and increase intensity for 15 seconds to 60 seconds of recovery
  • Tabata – 20 seconds of work to 10 seconds of recovery 8 times
Chris Book Cover

These ways to time intervals, plus additional timing options, are explained in my book, Water Fitness Progressions. The book also includes sample lesson plans that use these timing options with variations for moderate, somewhat hard or hard intensities. To order the book from the publisher, click on the title. The book can also be ordered from Amazon.com  

See you in the pool!

Chris Alexander