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Nov 2012
9:08am, 15 Nov 2012
22,277 posts
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Velociraptor
Was the calories-burned figure from your HRM with your own data entered, or a power-based figure generated by the spin bike?
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Nov 2012
9:11am, 15 Nov 2012
2,960 posts
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The Teaboy
The calories figure is probably a load of crap. You can probably estimate what distance you would have cycled at that intensity. Multiply by 45-50 (for your bodyweight) and get a much better estimate.
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Nov 2012
9:49am, 15 Nov 2012
3,038 posts
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Southwales22
I am a Spinning instructor & yes like the others are saying you probably need more resistance - seated flat road cadence in spin guidelines are between 80-110 & you should always be working with the resistance even on flat road...therefore when sprinting more needs to be added to stay in control of the pedals - more than likely those going 100mph are not working hard enough or as you say experienced cyclists
True spin classes are designed around a heart rate zone for every session so endurance (65-75%), strength (75-85%), interval (65-92%) or race day (up to 92%) of max heart rate....i dont know about other facilities but where i teach i am very much trying to put across the goal of each session same as you would when following a running training plan......so much so that ive had people say my classes are rubbish as they happened to turn up to an 'endurance' session & couldnt understand why they were not dead at the end...have a look at the spinning website they have some good info on there
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Nov 2012
2:05pm, 15 Nov 2012
3,494 posts
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icemaiden
The cals was from my Garmin - yes I know what we think about that - but my Polar HRM was out of commission with a flat battery.
Intensity was 68% which is cunningly close to my sub 70% running intensity so would estimate around 450 cals if running at that intensity for 45 mins. Distance wise I have no idea how far I would get because I seldom cycle on the road for that long at that intensity, I take a more relaxed pace on the road and would do about 9 miles in 45 mins (slacker).
As spin bikes don't have any feedback whatsoever (cheapskate LA fitness?) I have no idea either how many times per min my legs go round at any stage in the game, it is most frustrating all round.
I still had enough legs to bike home (3.5 miles bike there 3.2 back - different route as the roads were quieter by the time we'd finished) and then do a round trip of about 1.5+ miles of walking to collect SmallFry from an activity. And I'd already walked to school and back twice, so that was another 2 miles. It just takes such a bliddy long time to get enough exercise done these days.
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Nov 2012
2:41pm, 15 Nov 2012
6,686 posts
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Mrs Winkle
I do 45 minute RPM classes, and give myself around 300 - 350 calories burned for them. I have a resistance at about 60-70% effort for sprinting and am always about to reach the point of needing to stop at the end of an interval. I don't do heartrate, but I know that I am getting a bloody good workout 
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Nov 2012
2:47pm, 15 Nov 2012
2,978 posts
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The Teaboy
Rare that any gym equipment has a good calorie counter. Tend to be gimmicks IMO.
With spin bikes, I'm more interested in their adjustability and the quality of the ride/resistance. That is what the money really gets you.
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Nov 2012
2:55pm, 15 Nov 2012
7,239 posts
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Gymfreak
Cycling is my main sport now, so I quite often use spin classes as hard workouts- I do about 7 spin classes a week. And they ARE hard workouts- if you have enough resistance on the bike, you can make it bl**dy hard work. (I give myself about 250 calories for a 45 min class)
It's a bit frustrating that your spin bikes dont have a screen with RPM showing, but your HR monitor should still be able to give you a good indication of how hard you are working. You should find that as your legs get more used to the idea, you can push up your HR more. It took quite a while for me to turn into a cyclist (relatively!....) and make my legs strong enough to be able to push my heart hard enough. But it happens in time
(Some really dodgy instructors encourage sprinting with no resistance on the bike, please never do this, it's totally ridiculous)
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Nov 2012
3:17pm, 15 Nov 2012
9,257 posts
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Pootle
I used to do spin and was absolutely exhausted by the end. You need more resistance, I can't believe any instructor would have you spin with no resistance at all, that just sounds daft!
The bikes I used to use had no gadgetry on them either but I knew how hard I was working from how I felt. If it feels easy, just turn up that little dial...
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Nov 2012
4:10pm, 15 Nov 2012
6,687 posts
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Mrs Winkle
We have no screens, just a red dial. To be honest, I can tell if I need more resistance by how hard it is...
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Nov 2012
4:13pm, 15 Nov 2012
3,711 posts
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leaguefreak
I always find spinning hard - it's a toss up whether I need an ambulance or just a hearse at the end.
When I've done it's just been red dials and the instructor told us to adjust depending on perceived exertion and how that fitted with the goal of the class at that point etc.
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