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I know there are ratings when it comes to treadmills - generally the more expensive the better but I am finding that when I run on a Life Fitness treadmill my lower calves are fine,than when I run on a Technogym one which flares up a previous shin splint injury.
Does this sound unusual? Can there be differences in impact / injuries? Both are gym treadmills so i assume both are considered "good" and must be expensive.