This investigation is able to provide a great deal of useful information, for the sake of a few minutes of mopping up the floor afterwards! As an alternative to using talcum powder, felt adhesive pads, soaked in different colored dyes, may be fixed to the feet ( Rose, 1983).

2.3, to derive left and right step lengths, stride length, walking base, toe out angle and some idea of the foot contact pattern. A more useful method (but a rather messy one!) is to have the subject step with both feet in a shallow tray of talcum powder and then walk across a polished floor or along a strip of brown wrapping paper or colored ‘construction paper’, leaving a trail of footprints. The simplest direct method of measurement is to count the strides taken while the subject covers a known distance. Stride length can be determined in two ways: by direct measurement or indirectly from the speed and cycle time. Whittle BSc, MB, BS, MSc, PhD, in Gait Analysis (Fourth Edition), 2007 Stride length Additionally, injury may also cause asymmetries when comparing one extremity with the other. Injury to the lower extremities often causes gait parameters that are outside normal ranges. This walking speed of 1.17 m/sec multiplied by 1.2 seconds yields a stride length of 1.4 m. For example, our athlete walking 70 m/min would walk 1.17 m/sec. Now that walking speed is converted to meters per second, it may be multiplied by stride time to give an appropriate stride length. This simple conversion may be done by dividing by 60 (60 seconds equals 1 minute). 5 However, the walking speed used here must be converted to meters per second as opposed to meters per minute.

Stride length is equal to the product of stride time and walking speed. 5, 6, 16 Thus, an athlete who produces five strides in 6 seconds has a stride time of 1.2 seconds (a stride is completed every 1.2 seconds). Stride time may be calculated from the time to produce a number of strides divided by the number of strides taken or by summing the average right and left step times. Stride time is the amount of time from consecutive heel contacts of the same foot. Stride length can also be derived from walking speed and stride time. Our athlete with a gait velocity of 70 m/min and a cadence of 100 steps per minute would have a calculated stride length of 1.4 m: (70 m/min)/(0.5) × 100 steps per minute = stride length of 1.4 m. 17 Stride length is equivalent to velocity divided by 0.5 cadence (speed/0.5 cadence). Stride length can be calculated from cadence and walking speed. Barry Dale PT, PhD, ATC, SCS, OCS, CSCS, in Physical Rehabilitation of the Injured Athlete (Fourth Edition), 2012 Deriving Temporal Data Hopefully they can get this sorted out at some point. I'm glad you received confirmation that they are aware of a problem at least, but I've been waiting for a long time for this to be fixed.R. This may point to a problem in the communication between the phone and the Blaze. While watching the screen and manually counting steps, sometimes the 0.01 would occur after 13 steps and sometimes after 20, and anywhere in between. For a stride length of 2.5 feet, I should get roughly 0.01 miles for each 20 steps taken. One thing I noticed today is that the distance displayed on the screen during the walk is inconsistent. The step count seemed to be better before the latest update, but I have always had this problem to various degrees since I got my Blaze on launch day. Most of the time, both the distance and steps are off. Other times I will get the wrong distance but the steps are more accurate and the stride calculates to a reasonable number. Sometimes the distance will be correct (known from previous experience on a particular walk), but I'll be shorted steps such that my stride length calculates to over 3 feet.

So I am having two problems: the Blaze undercounts my steps by anywhere between 15 and 40%, and the Blaze gives inaccurate distance at times when using connected GPS. I very rarely get anywhere close to that value. I figure that is due to the problem with undercounting steps, but if the distance was truly calculated by steps and not by GPS then it should always calculate out to 2.5 feet. I have my stride length setup as 2.5 feet, but often when I calculate the stride for a particular walk using the recorded distance and the number of steps it usually ends up being around 3 feet. Distance measurement when using connected GPS does not correlate to my inputted stride length.

Step counter 1 stride 2 steps