INTRODUCTION
In idiopathic pulmonary fibrosis (IPF), Despite having a normal weight, due to an increase in fat, they present a decrease in lean mass, requiring specific assessments to know their real nutritional situation. The objective of this work is to know the nutritional status and body composition of patients with IPF through new techniques for a better diagnosis and intervention

Material and methods
A prospective, multicenter study has been carried out in patients with IPF. All of them underwent a clinical and morphofunctional assessment

Results
106 with IPF, 93 men, age 71.26 years. Mortality is 13.6%. The evolution time is 31 months. Average FVC of 68.42% and DLCO of 76%. Average GAP in points 3.95. Dyspnea 1.96mMRC. Except for one, all are undergoing antifibrotic treatment, with a mean time of 21.85 months
56.8% of the sample presented risk of moderate malnutrition according to VSG and 23.8% severe malnutrition.
Current weight 79.2±12.2 kg, PhA (Phase angle) 4.9°±0.73, SPhA -0.85±0.94, ASMM 20.5±3.2(Appendicular skeletal mass muscle), BCM (body mass cell) 26.4±5.02, Area 3.42± 1.09cm², Circumference 8.58±1.32cm, X Axis 3.6±0.53 cm, Y Axis 1.16±0.45 cm and Average dynamometry 33.6 ± 9.91 kg
There is a correlation between the techniques of bioimpedance measurement with phase angle and nutritional ultrasound, comparing the BCM with the muscle area of r=0.616, p <0.001, and the BCM with the mean dynamometry r=0.608, p<0.001

Conclusions
There is a high prevalence of moderate and severe malnutrition in IPF
Combined muscle ultrasound and functional tests confer greater predictive capacity for muscle mass in IPF
The new assessment techniques are presented as a fundamental complement to assess the patient with IPF