Tsarnaev shows how he strengthens his ankles, according to the photo essay. The photographer did not want to be named for this story.
{"Image ImageWidth": "2017", "Image ImageLength": "3026", "Image BitsPerSample": "[8, 8, 8]", "Image PhotometricInterpretation": "2", "Image ImageDescription": "Image #: 22045651    ***EXCLUSIVE. PLEASE CALL 212-251-0140 TO NEGOTIATE RATES.***  BOSTON, MA - APRIL 2009: Tamerlan Tsarnaev practices boxing at the Wai Kru Mixed Martial Arts center in April 2009 in Boston, Massachusetts.  THESE images show what is believed to be Boston bomber Tamerlan Tsarnaev boxing at the Wai Kru Mixed Martial Arts center in Boston, MA. The native Chechnya, dubbed Suspect 1 by the FBI, and has been reported as dead. He was described as a heavyweight fighter at the gym, and allegedly hoped to fight for the US, because his home nation was not recognised in the sporting world.   Barcroft Media /Landov", "Image Orientation": "Horizontal (normal)", "Image SamplesPerPixel": "3", "Image XResolution": "72", "Image YResolution": "72", "Image ResolutionUnit": "Pixels/Inch", "Image Software": "Adobe Photoshop CS6 (Macintosh)", "Image DateTime": "2013:04:19 14:01:54", "Image Artist": "BARCROFT MEDIA", "Image Copyright": "Barcroft Media", "Image ExifOffset": "936", "Thumbnail Compression": "JPEG (old-style)", "Thumbnail XResolution": "72", "Thumbnail YResolution": "72", "Thumbnail ResolutionUnit": "Pixels/Inch", "Thumbnail JPEGInterchangeFormat": "1088", "Thumbnail JPEGInterchangeFormatLength": "6526", "EXIF ExifVersion": "0221", "EXIF ColorSpace": "sRGB", "EXIF ExifImageWidth": "1280", "EXIF ExifImageLength": "720"}