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    5K effort won't burn any fat? O_o

    Scheduled Pinned Locked Moved Suunto 9 Peak
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    • ChrisAC Offline
      ChrisA Platinum Member @Dimitrios Kanellopoulos
      last edited by ChrisA

      @dimitrios-kanellopoulos as far as I understand the body burns energy from different sources depending on the duration and intensity you workout:

      1. for fast and immediate energy, muscles use energy that’s stored in the muscle itself in form of ATP which only lasts for about 10 to 20 seconds and after that the body starts converting glucose to ATP to supply the muscles with energy (faster process) and also converts fat as a supply too (slower process). So when you workout in a high HR Zone the body supplies energy first and for the bigger part from stored glucose. As far as I understand this works for 60 to 90 minutes unless your glucose supplies are used up, why runners (not me 😅) who can run that long should then - or better before - resupply glucose.

      2. The conversion of fat to muscle usable energy takes longer and therefore the constant level of energy they provide is only enough for exertions in lower HR zones but this process can then go on for hours. That’s why you can walk / hike a whole day or even longer without the need to eat something.

      In the end - when talking about loosing/gaining weight - it’s not so important if the body uses fat or carbs (or proteins) as an energy source but only how many calories you burn and how many you resupply by eating food as the body can convert carbs to fat and so when using a lot of carbs as energy the body can’t turn this used up carbs into bod fat anymore.

      lexterm77L 1 Reply Last reply Reply Quote 2
      • lexterm77L Offline
        lexterm77 Bronze Member @ChrisA
        last edited by

        Beta oxidation peaks at about 60% of vo2 max and then it goes down but never to 0 because then you are dead. Same for carbs, never goes to 0 unless not alive.

        https://pubmed.ncbi.nlm.nih.gov/6571234/

        There is a test on how to do a beta oxidation rate
        https://www.mysportscience.com/post/2015/03/18/what-is-fatmax

        Out of curiosity I will do a 12h fasting 2h depletion run one time, and then repeat same run next week with carbo loading to see if burner only relies on itensity or some other trick.

        ChrisAC jmoneygripJ Dimitrios KanellopoulosD 3 Replies Last reply Reply Quote 1
        • ChrisAC Offline
          ChrisA Platinum Member @lexterm77
          last edited by

          @lexterm77 said in 5K effort won't burn any fat? O_o:

          Out of curiosity I will do a 12h fasting 2h depletion run one time, and then repeat same run next week with carbo loading to see if burner only relies on itensity or some other trick.

          I am think it’s intensity based only. But would be interesting to see, if fasting and a long run afterwards would show any difference compared to one, with well supplied glucose storages.

          1 Reply Last reply Reply Quote 1
          • jmoneygripJ Offline
            jmoneygrip Bronze Member @lexterm77
            last edited by

            @lexterm77 it’s intensity for sure. As suggested earlier in the discussion, as you reach a higher percentage of your VO2 max your body transitions from burning fat to burning sugar (aka glycogen). This is known sport science and a big part of heart rate zone training. The burner feature is just looking at your heart rate zone.

            People are different within reason but the OP already confirmed he was at or near max heart rate, we’ll all burn sugar instead of fat in that scenario so the results are not surprising.

            S9P
            SSU (sold)

            1 Reply Last reply Reply Quote 1
            • Dimitrios KanellopoulosD Offline
              Dimitrios Kanellopoulos Community Manager @lexterm77
              last edited by Dimitrios Kanellopoulos

              @lexterm77 once my toe is back to business, I can share with you guys how fasted long runs or intervals look like. 24-48h fasted and blood glucose levels if you are interested.

              (Might have a few data from prev days as well)

              Community Manager / Admin @Suunto
              Creator of Quantified-Self.io
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              BulkanB ? 2 Replies Last reply Reply Quote 5
              • BulkanB Offline
                Bulkan Moderator @Dimitrios Kanellopoulos
                last edited by

                @dimitrios-kanellopoulos yes please share. I’m interested in.

                Another topic about glucose?

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                • MiniForkliftM Offline
                  MiniForklift Platinum Member
                  last edited by

                  All of my early morning runs (unless they’re going to be longer than 30km) are fasted. Supposedly we have enough glucose available to be converted to energy for at least a couple of hours of early morning activity before we start pulling it from less desirable places

                  SV Titanium Solar Forest

                  L 1 Reply Last reply Reply Quote 0
                  • L Offline
                    Likarnik Bronze Member @MiniForklift
                    last edited by

                    I did a 100km ride after 18h fast and took only water with me (so in the end 21h+ fast). Almost only Z1. I expected different result:

                    fat.png zones.png

                    ? 1 Reply Last reply Reply Quote 0
                    • ? Offline
                      A Former User @Dimitrios Kanellopoulos
                      last edited by

                      @dimitrios-kanellopoulos said in 5K effort won't burn any fat? O_o:

                      @lexterm77 once my toe is back to business, I can share with you guys how fasted long runs or intervals look like. 24-48h fasted and blood glucose levels if you are interested.

                      (Might have a few data from prev days as well)

                      Totally interested. Started on fasting and also “ordered” first month of supersapiens to test.
                      More focus on loosing weight and stabilizing appetites etc, but everything that comes with it is bonus.

                      1 Reply Last reply Reply Quote 0
                      • ? Offline
                        A Former User @Likarnik
                        last edited by

                        @likarnik said in 5K effort won't burn any fat? O_o:

                        I did a 100km ride after 18h fast and took only water with me (so in the end 21h+ fast). Almost only Z1. I expected different result:

                        fat.png zones.png

                        you z1 is till 149?

                        Dimitrios KanellopoulosD L 2 Replies Last reply Reply Quote 0
                        • Dimitrios KanellopoulosD Offline
                          Dimitrios Kanellopoulos Community Manager @Guest
                          last edited by

                          @andré-faria

                          Fasted 28h and 2+ hours workout. (does not include 30 min warmup. )

                          Here is the workout

                          Screenshot_20211011-111618.jpg Screenshot_20211011-111610.jpg

                          Watch that witb fasted workout + not z5 the intervals (except the last that I pushed more) kept the lows of HR low (no increase as usually happens).

                          Blood glucose was low, expected but it didn’t have any impact.

                          Will test more when I am better.

                          Community Manager / Admin @Suunto
                          Creator of Quantified-Self.io
                          youtube.com/c/dimitrioskanellopoulos
                          https://instagram.com/dimitrioskanellopoulos
                          https://www.strava.com/athletes/7586105

                          lexterm77L ? 2 Replies Last reply Reply Quote 1
                          • L Offline
                            Likarnik Bronze Member @Guest
                            last edited by

                            @andré-faria yes, I calculated zones based on my LTHR (tested both on run and bike, I averaged 182bpm/20min).

                            @Dimitrios-Kanellopoulos great effort on 28h fast!

                            1 Reply Last reply Reply Quote 0
                            • lexterm77L Offline
                              lexterm77 Bronze Member @Dimitrios Kanellopoulos
                              last edited by

                              @dimitrios-kanellopoulos

                              This morning I was able to go 32g/h fat average that is only at 210W at 63% of VOMax. Fasted 12h and hung over.

                              8A732A41-DAA7-47E5-8C0D-9C95CFE476B9.png

                              1 Reply Last reply Reply Quote 1
                              • ? Offline
                                A Former User @Dimitrios Kanellopoulos
                                last edited by

                                @dimitrios-kanellopoulos Nice job, but what’s with the fasting about? If I may ask and I’m not indiscreet.

                                Dimitrios KanellopoulosD 1 Reply Last reply Reply Quote 0
                                • isaziI Offline
                                  isazi Moderator
                                  last edited by

                                  I think this [1] is not computed as HR zones, but as % of VO2max, therefore some people may see strange results if compared to the zones they have configured.

                                  I eat pasta at least once a day, sometimes twice 😄

                                  [1] with this I mean the S+ app

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                                  suzzloS lexterm77L 2 Replies Last reply Reply Quote 2
                                  • suzzloS Offline
                                    suzzlo Moderator @isazi
                                    last edited by

                                    @isazi said in 5K effort won't burn any fat? O_o:

                                    I eat pasta at least once a day, sometimes twice

                                    old way

                                    😆 😆 😆

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                                    • lexterm77L Offline
                                      lexterm77 Bronze Member @isazi
                                      last edited by

                                      I eat pasta at least once a day, sometimes twice 😄

                                      What good is pasta if you don’t grow/cook your own tomato sauce? 😁

                                      isaziI 1 Reply Last reply Reply Quote 1
                                      • isaziI Offline
                                        isazi Moderator @lexterm77
                                        last edited by

                                        @lexterm77 never had to buy tomato sauce when I lived in Italy, my family buys few hundred kilos of tomatoes in the summer and makes sauce for the rest of the year in bottles 🙂

                                        Watch: Suunto Vertical Ti

                                        Blog: isazi's home

                                        lexterm77L 1 Reply Last reply Reply Quote 5
                                        • lexterm77L Offline
                                          lexterm77 Bronze Member @isazi
                                          last edited by

                                          @isazi

                                          I understand completely, I bought “tomato sauce” in a super market and I was so disappointed I started my own garden like my family did in Europe. I got maybe 5kg per plant 25plants this year, ate half of them raw if not more.

                                          Nothing beats pasta & tomato sauce 😋

                                          This may be the last box this year.

                                          IMG_8223.jpeg

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                                          • Dimitrios KanellopoulosD Offline
                                            Dimitrios Kanellopoulos Community Manager @Guest
                                            last edited by

                                            @andrasveres nothing is up. It’s a habit. I just eat once. Only water in-between and training.

                                            Community Manager / Admin @Suunto
                                            Creator of Quantified-Self.io
                                            youtube.com/c/dimitrioskanellopoulos
                                            https://instagram.com/dimitrioskanellopoulos
                                            https://www.strava.com/athletes/7586105

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