Online Bike Coach

Where Cyclists and Triathletes get Faster/Stronger/Leaner/Sooner

75 XSS (Per Day), for 75 Days: A New Self-Challenge

75 Days of 75 XSS (Xert Strain Score) Points – Let’s See Where This Leads

75 XSS per day, roughly 5 days per week? Can I achieve this?

The Xert Strain Score (XSS) is a volume-measuring tool that looks at a cyclist’s time, wattage, energy expenditure, and overall fitness signature. The calculation is unknown, but for me, it roughly equates to 10 KiloJoules per point when cycling aerobically. In conjunction with XSS, a cyclist’s “FOCUS” and “POLARITY” are revealed on a per-ride basis. XSS also affects Training Load and Form. Focus tells a cyclist where their ‘concentration of benefits’ has resulted from the ride. Polarity is revealed in the color of FOCUS. It tells the cyclist whether their ride was “Pure”, “Polarized”, “Less Polarized”, and “Mixed”.

Why 75 XSS?

Garmin 1030 Xert Screen
My goal is to earn 75 XSS per day, roughly 5 days per week. Some days will be purely aerobic, using DFAa1 Heart Rate Metrics, while other days will be intensity based, and will probably be performed out on Singletrack.

I chose 75 XSS for several reasons.

First – 75 XSS follows my favorite mantra in fitness training: SMART.

  • Specific – It’s a value I can follow on the main screen of my Garmin 1030
  • Measurable – 75 XSS is the result of energy and time spent cycling.
  • Achievable – this is a big one; my time commitments have changed over the months and the entire Western US is under a severe drought. This requires that I ride earlier in the day, and spend less time on the mountain bike. 75 XSS also requires roughly 750 KiloJoules, which is less than 2 hours of time spent cycling. In short, I can ride and get home for other commitments.
  • Repeatable – 75 XSS is something I can achieve about 5 days per week and still not get too fatigued. My goal is to do this about 5 days per week.
  • Timely – It’s summer, the days are long, and this should lead to a higher level of chronic fitness without getting too stale.

Why 75 XSS in 75 days?

75 Days of XSS, roughly 5 days per week, would put me at roughly the end of August. I really have no goals. There might be some late-season bike rallies I would like to attend. Perhaps there are some Cols I would like to climb in the Fall for PR’s. Bike racing is picking up in the Northern Nevada area. However, after a successful Fall of 2020, and some solid prep work in January and February of 2021, I lost some fitness. This led to a drop from a high level of performance on the mountain bike and road bike. I also started gaining weight again. Thankfully, with the help of BT-Nutrition’s Reful App, I have again begun to lose weight, and my performance has turned a slight corner. A 75 day MesoCycle will give me time to ride at lower intensity out on the road bike, and higher intensity out on the mountain bike. On days that I am performing low-intensity rides, 75 days where I burn at least 60 grams of Fat, SHOULD yield some weight loss. My goal is to get back down to 67-68kg without losing power.

What’s my FOCUS?

My FOCUS for this effort is two-fold. First, I’m going to force myself to ride longer periods at lower intensities on a consistent basis. After lots of consulting with professionals and observation with my clients, we will all be implementing regular “DFAa1” slope tests to better determine a more accurate Lower Threshold of Aerobic Intensity. For me, this translates into efforts at a HEART RATE below 150 beats per minute. This also translates into a LONGER period of time out on the road or trail to achieve 75 XSS. 89% of my clients and myself are showing a wattage/HR value that is about 5-10% below Xert’s LTP. Less intensity means fewer KJ’s per minute and per hour, so it has to be made up with time.

Xert Adaptive Training Advisor Rainbow Dial
I like Xert’s Adaptive Training Advisor. I prefer the Rainbow Dial to the interval targets and workout goal. The Advisor does not account for other aspects of training and recovery. Instead of 193w, I’m making my endurance rides roughly 170 watts of intensity, and this correlates with the DFAa1 system of determing lower threshold. This is making my easier rides easier, and longer, with less strain (something rarely discussed in Xertworld.)

On my harder days, I’ll be performing intervals in the “Pursuiter” and “Puncheur” range of intensity (30-90sec efforts above 350w for me), so that my WEEKLY FOCUS will be in the “Rouleur” and “Breakaway Specialist” range of intensity. I will use the Rainbow Dial in Xert, but I’m not going to use the Suggested Workouts, which tend to favor blocks of workouts that don’t follow my plan for 75 XSS and don’t agree with my plan for intensities. I’ve followed this path before, but with 30 years of experience, I know my own body better.

TRAINING TOOLS

I’ll be including files or links to files for download for everyone to peruse. I’m going to use the Vo2master as much as possible, so that my gas exchange can be monitored and reviewed. I’ll be recording the Saturated Muscle Oxygen (SmO2) on my Left Lateralis, as well as my Total Hemoglobin Count. These are not shown on Xert, and will be analyzed separately. Finally, I’ll be performing regular DFAa1 ramp tests (probably every Monday), indoors, to then post on www.runalyze.com, for review on my lower intensity threshold.

The GOAL

The goal, with 75 XSS over 75 days, is to try and get back up to about 290-300 watts for my Functional Threshold Power, keep 25-30 High Intensity Energy KiloJoules, drop my body weight to 67-68kg, and learn about my body through the instruments I’m providing.

Thanks for joining me on this journey.  I hope the regular posts lead to better discussions about training, fitness, recovery, nutrition, hydration, and enjoying the experience of the ride.

Xert Breakthrough With Physiological Metrics

Xert Is On Board With Some Serious Physiological Observations

My Client, Dusty, achieved an Xert Breakthrough while I observed his Physiological Metrics. This is Part 2 of what will now be a 3-part series of videos. In Part 1, I described the physiological phenomena behind a good warmup. Today, we’re going to show how Xert MPA metrics correlate with physiological phenomena.

The protocol are my favorite Billat 30-30’s. This means a cyclist pedals for 30 seconds of intensity, followed by 30 seconds of recovery. After five to ten intervals above Threshold Power, the cyclist then begins to pedal at intensities above the 3 Minute Mean Max Power.

THE CLIENT

Dusty came into the office with an Xert Fitness Signature of 306 Watts at Threshold, 21.4 KiloJoules of High Intensity Energy (HIE) available, and a Peak Power of 854 Watts. The goal was to attempt an Xert breakthrough, while using a Moxy Monitor and a Vo2 Master, to observe his physiological markers under intensity. I’ll explain what these numbers mean in Part 3.

Dusty is 44 years old, has been back on the bike for about a year, but has no long-term history of fitness or exercise. The bike was borrowed – he did not have a power meter for a road bike at that time. He has been training via Peloton bike and classes, roughly 5 hours per week. His goal is to be a competent coach to his son and friends in their High School Mountain Bike League. He has a power meter for a mountain bike, and a modern Garmin. At the time of the test, he had been using Xert for about 6 weeks. We had some data, but we needed to get a proper assessment.

XERT BREAKTHROUGH WITH BILLAT 30-30’s

Dr. Veronique Billat remains one of my favorite Exercise Scientists. She is the author of vVo2max exercise studies, and I translated those values over to wattage at Vo2max efforts, beginning in 2001. They are the cornerstone of any Alpine Mountain Bike athlete. While Dr. Billat uses 6MMP values, Xert uses 3MMP values to get cyclists to work harder. This is my own interpretation of “Polarized” training. Work done above 3MMP to 5MMP is highly effective for anaerobic intensity and success, just as work performed BELOW Lower Threshold Power, is also highly effective for aerobic economy.

In Part 3, I’ll perform a review and assessment of the activity, and will reveal Dusty’s new Xert Fitness Signature.

Thanks for reading, thanks for watching, and ENJOY THE RIDE!

Xert Breakthrough With Physiological Metrics Part One – Warmup

We Use a Moxy Monitor, a Vo2 Master, PerfPro Studio, and Xert To Show a PROPER Warmup

I continue to learn something almost daily when it comes to mixing Physics and Physiology. The data that we get and use for wattage training, is almost always complemented by the information I collect from physiology. We have to look at EXTRINICS and INTRINSICS. Extrinsic information revolves around information that the bike provides; Wattage, Cadence, Speed, etc. INTRINSIC information comes from Heart Rate, Saturated Muscle Oxygen, Total Hemoglobin, Gas Exchange Analysis, and even Lacate, when I can get it.

This video is part one of a two-part program where I helped a friend determine just what his fitness signature really was. This Intro explains the metrics on the video, and the proper way to warm up the body for work. Part Two is the Billat 30-30’s that we used to actually achieve a fitness breakthrough, and set Dusty’s Fitness Signature in Xert.

Since accomplishing this test in mid-February, Dusty has improved his fitness signature even more, and he is implementing the concepts of Polarized training, for himself and his entire family.

Thanks for watching, and ENJOY THE RIDE!

Coach Wharton believes in sharing his passion for cycling and fitness with everyone. IF you feel you got something rewarding out of this post, click on the link below and show some support!

Xert FTP Tested

Xert Claims my FTP (Functional Threshold Power) Sits At 265 Watts. Is It Accurate?

I've always wondered if calculated Functional Threshold Power Values are accurate. Since 2017, however, I have relied on the Xert FTP value. For years, we relied on the "20-Minute" Test. Riders would perform a 20-Minute effort, all out, and then subtract 5% from that value. The new number was considered "Threshold". Later, physiologists looked at 90% of a 3-Minute Maximal Effort. There's the 5-1-5 test.... Step Tests (25w steps every 3 minutes)... Ramp tests (15-20w every minute)... The latest 'Testing' asks for a 20-minute, 5-minute, 1-minute, and 5-second effort.
Xert FTP Garmin PerfPro Studio Vo2 Master
Xert Claims that my FTP (Functional Threshold Power) is at 265 watts. Let's find out how accurate that really is.

NO MORE TESTING???.

Become a subscriber and get access to this post and our entire coaching library, all for less than the cost of a movie ticket. Click here to learn more.

Already a subscriber? log in

Moxy Monitor Warmup Protocol

The Moxy Monitor Warmup Protocol Ensures a Better Ride!

 

The Moxy Monitor gives cyclists a better window into their body, and how the body responds to intervals and recovery. When we use the Moxy for warmup observations, we end up with a higher saturated muscle oxygen (SMo2), and a higher Total Hemoglobin Count (ThB). You want this higher SMO2 and ThB, because it is the electrical equivalent of “Volts”, and “Amps”, on a battery. With Watts, you have a more complete picture!

My wife, Tracy Christenson, was the model for this video, and after the warmup, she performed two 6-minute intervals, just below her predicted Functional Threshold Power. The Moxy Monitor’s SmO2 and ThB information provided there was also very instructional.

Watch the Video to learn more.