If you want to improve your cardiovascular fitness level over time the best way to do that is through cyclical training. I remember when I started training for my first half ironman and I thought how am I going to complete this 70.3-mile race? Fortunately, as I found out, the human body has an incredible ability to adapt to almost any situation it finds itself under. This update will address how to maximize your training to achieve optimal results.
The best way to achieve this is to train in cycles. As you move through the cycles your body will be better able to adapt. Two key equations about this cyclical training are
STRESS + REST = PROGRESS and 80% EASY/20% HARD.
This may seem counterintuitive, in that you get faster/better the more you take it easy. The hard workouts (20%) stress your body and cause it to adapt, and when you rest is when your body improves and adapts. This is where the concept of cycles comes in to play. There are three types of cycles to focus on a meso, a macro and a micro cycle.
Usually training plans go year to year and the meso cycle is figuring out which achievements you want to accomplish and at what times during the year. You don’t want to have top level races or goals occurring one right after the other. You can’t always be at the top of your game week in and week out as it will likely lead to overtraining, injury and setbacks. Thus, on the yearly basis you have times to train, times to peak, times to recover and this will allow you to do this over again throughout the year.
The macro cycle focuses on smaller cycles within the yearly training plan. Most people will focus on three- or four-week cycles. What this means is that week 1 is easy, week 2 and/or 3 are harder and week 3 or 4 is the hardest. Then you start over again with and easy week and increase training over the next cycle. As you do this each week will be at a likely higher level than the previous cycle. If you do not include rest in your cycles, you will lead to overtraining.
The last cycle is the micro cycle. This includes which days you train hard and which days to take it easy, as well has how you plan your daily workouts. For example, during a training day you want to have a warm up, hard training time and then a cooldown as an example. During these micro-cycles you want to include some easy days or rest days where you don’t train at all. Cross training can also be helpful for recovery days. My favorite recovery actively now is playing pickleball for an hour or two.
During all these cycles you want to focus most of your time (80%) in heart rate zone 1 or zone 2 training. More on heart rate zones can be found in a previous update from February 2025. The remaining 20% of the time in the cycles can be focused on hard training sessions, in heart rate zones 4 or 5. Professional athletes use this concept of cyclical training to guide their training plans and are not always training at a high level all of the time. It has been shown over time and across many disciplines that the 80/20 ratio is the best way to achieve your optimal fitness levels.
In a previous post in May of 2024, see below, we discussed about why improving your cardiovascular health was important. One of the topics we mentioned briefly was training in heart rate zone 2. Today’s post will cover how the different heart rate zones can be utilized to optimize your training and cardiovascular health.
Heart rates zones relate to the intensity of the workout by measuring your heart rate and are divided into 5 zones for basic understanding and up to 8 or 9 for those who want to geek out on them. Heart rate zones are based upon either your maximum heart rate, or your functional performance heart rate. The zones run from rest to all out exertion and knowing which zone your heart rate is in can help you optimize your training.
An easy way to estimate your maximum heart rate is to subtract your age from 220. Thus a 40-year-old has a maximum heart rate of 180. Then from there you can determine your zones as follows:
Zone 1 (50-60% of maximum 90-108): Light activity, easy conversation
Zone 2 (60-70% of maximum 109-126): Fat-burning zone, sustainable effort
Zone 3 (70-80% of maximum 127 - 144): Increased intensity, challenging conversation
Zone 4 (80-90% of maximum 145-162): High-intensity, difficult to speak
Zone 5 (90-100% of maximum 163-180): Maximum effort, very short duration
There are also numerous calculators on the internet that help you calculate your zones based on differing variables such as age, maximum heart rate, resting heart rate, heart rate reserve, etc. Many of the fitness apps and fitness trackers and watches these days also have built in heart rate zones based on your performance.
There are two zones that are important to most people for their training, zone 2 and zone 4. You want to spend 80% of your training in zone 1, for warmups, or 2 for longer efforts. This builds endurance, increases mitochondria, burn fat, and allows you to continue your activity for long periods of time without over stressing your body. Zone 4, used for short intervals, is where you ideally want your workouts to be, once you are in shape. Zones 4 and 5 build your V02 max (maximum rate of oxygen consumption) or your anaerobic capacity. Polarization of workouts, going very easy most of the time (zone 1-2) 80% of the time and hard a small amount of time (zone 4-5) 20%, leads to optimal training. Most people spend too much time in zone 3 and 4 thinking that the faster they train, the better they will be. Too much time spent above zone 2 leads to injuries, burnout, without any gain and takes the joy out of exercising. To go faster you should spend more time running slow.
These numbers and rates are a good place to start, but I would recommend tweaking them over time as your cardiovascular fitness improves to achieve optimal conditioning.
We mentioned in a previous update that cardiovascular fitness was one of the two most modifiable factors to improve your quality of life and health span. The other most modifiable risk factor for a long and healthy life that you can impact is your muscular fitness. Believe it or not you begin to lose your muscle mass in your 40s and if you don’t address that you will become more debilitated by the time you are in your 60s. So, what can you do to reduce your chances of becoming debilitated later in life? Have a consistent emphasis on exercising your muscles on a regular basis.
The current recommendations are performing muscular exercises at least 2-3 times per week to slow the loss in muscle mass and strength that will inevitably occur. These workouts are separate from your cardiovascular workouts, as I have found out. If you run, bike, swim or do some other type of cardiovascular exercise, you are increasing the stamina of your muscles. The intent of muscular fitness exercises is to increase both the strength and power of your muscles. Stamina is the ability to perform a sustained activity for a longer period of time. Strength is the ability to move a heavy weight and power is the speed at which you move a weight. As an example, you may be able to push a 150-pound object (strength) across the floor but it may take you 20 minutes to go 10 feet . On the other hand, you could push a similar 75-pound object across the floor in say 5-6 minutes (power) and lastly you could push a 30-pound weight across a floor for an hour (stamina). Ideally you want to develop and maintain both power and strength with your muscular exercising. This will enable you to continue to function at your optimum for a longer period regarding lifting and carrying and has implications in improved balance and overall fitness. Think carrying groceries, lifting grandkids, moving furniture, hiking, etc.
There are several ways to increase your muscular fitness. Calisthenics are a good beginning as you can to them almost anywhere and anytime. Examples of calisthenic exercises are abdominal exercises, pushups, planks, squats, lunges, chin-ups, etc. Moving up the exercise ladder next would-be utilizing exercise bands, then a home weight set, attending exercise classes or going to a gym with exercise machines, or a installing a home gym. Each of these may cost more and consume more of your time. Core exercises, those which work your core muscles, would include leg presses, bench presses, curls, and extensions exercises. There are numerous videos available to suit your needs and levels, so look around and find one that you would be able to perform consistently and safely.
You want to perform 2-3 sets of 10 repetitions of each exercise 2-3 times per week. After a few weeks you should notice increased tone, strength and power in your muscles. The goal again is to maintain your strength and power as best you can once you are over 40. Lastly make sure that you space your workouts during the week. Doing these exercises two days in a row will not have as much impact as doing them a few days apart. Your muscles grow and strengthen on your days off and during sleep, not during the workout itself, even though your muscles may feel sorest then. If you want ,you can focus on different areas each day if you want to work out on a daily basis. An example would be extension exercises for arms one day, then extension exercises for the legs next, then arm flexion exercises, then leg flexion exercises, then back and abdomen exercises as an example.
You should focus on proper technique as performing these exercises incorrectly can lead to joint or muscle injuries. Also don’t worry about bulking up your muscles with these recommendations as it takes a lot more time with fewer repetitions with higher weights to significantly increase your muscle mass. I have been doing calisthenic exercises all my life and have not bulked up on my muscles, but I do have tone, strength and power while staying lean. So what’s stopping you from improving your muscles and your life?
Cardiovascular exercise is one of the most modifiable lifestyle behaviors that you can impact on your own. Improving how your heart and lung’s function and how they support each other can improve quality of life and life span. The good news is that you don’t need much to improve it, other than time. Having a better cardiovascular fitness level will lead to better metabolism, better sleep, better mental health and much more. So, how do you go about improving your cardiovascular system? By doing more exercise! For those who aren’t already actively exercising, any amount of exercise will improve your cardiovascular fitness. Studies now show that as little as 10 minutes of walking per day can make a sizeable improvement in your health. The sweet spot for cardiovascular exercise seems to be doing at least 150 minutes per day of moderate exercise per week. This can be accomplished in several ways, such as 25 minutes 7 days a week, 30 minutes five days a week, or even 75 minutes each day on the weekend. They all will have about the same impact on improving your cardiovascular heath. The most important factor is determining what you enjoy doing and can do on a consistent basis.
The simplest way to start with is just walking. Other options are running, rowing, swimming, biking, jumping rope, exercise classes, essentially any exercise that will get your heart rate and breathing rate up continuously for the desired time period will work.
To determine if you are improving, keep track of your time, distance, and effort and you should see these improve as you do more of the exercises over time. Keep in mind that your body is incredibly adaptable and after a while your body will become adjusted to your exercise routine. You won’t continue to see as much of an improvement over time, as there is a physiologic limit to how much you can improve, but don’t let that stop you.
While there are numerous ways to measure cardiovascular fitness such as VO2 max, functional threshold testing, heart rate recovery, etc. there is no one best way. There are several simple ways to measure your fitness level depending on where your baseline is to start with. Then periodically you would repeat this test to see how much you have improved.
Many of the fitness watches now can track your exercise with heart rate monitoring, recovery rate and some include heart rate variability. You can use these devices to monitor your cardiovascular levels over time.
If you are sedentary and have not exercised, I would recommend the six-minute walk time. Simple enough to do, just measure how far you can walk in six minutes. By walking we mean that at least one foot is always on the ground at all times. This is different than jogging/running where you briefly have both feet off the ground. So, pick a starting point and use a timer to determine how far you can walk at a fast pace for 6 minutes. Notice where this finishing spot is as you will be comparing future walk times to this spot.
If you have been active already then doing a 1 mile run time, measuring your 2 minute workout recovery time, or resting heart rate are some other ways to assess your cardiovascular fitness.
What if I told you about a pill that improves your metabolism, reduces stress, improves sleep, reduces depression, improves immune system function, reduces blood pressure and improves overall energy? You would want to take it daily every day, right?
Well, there is not a pill that does this today, but exercise does this and more! You don’t need a gym membership, a Peleton, or similar pricey equipment. Exercise can be done at a low cost, can be done almost anywhere and anytime. There are two types of exercise that are the base upon which to build everything else. The two are cardiovascular exercises and strength exercises. Read on to find out how to best optimize this opportunity to improve yourself!
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